RM15.00
The MAX30102 is an integrated pulse oximeter and heart rate monitor biosensor module. It integrates a red LED and an infrared LED, photodetectors, optical devices, and low-noise electronic circuits with ambient light suppression. The MAX30102 USES a 1.8v power supply and an independent 5.0v power supply for internal LED, which is applied to wearable devices for heart rate and blood oxygen collection and detection, and is worn on fingers, earlobes and wrists. The standard 12c-compatible communication interface is high to transmit the collected values to Arduino, KL25Z and other SCM for heart rate and blood oxygen calculation. In addition, the chip can also be closed by the software module, standby current is close to zero, the power supply to maintain the state of supply. Because of its excellent performance, the chip is widely used in samsung Galaxy S7 phones. Compared with the previous generation product MAX30100, the MAX30102 integrated glass cover can effectively eliminate the external and internal light interference, has the optimal and reliable performance. The heart rate blood oxygen sensor module is a biosensor module made according to the power requirements of MAX30100/MAX30102. Its 12C communication interface voltage is compatible with 1.8v /5V, and can be developed with conventional MCU board KL25Z, stm32, etc. In addition, it also provides the corresponding heart rate and blood oxygen program, which can be easily used to complete the monitoring of heart rate and blood oxygen concentration in cooperation with a variety of development boards. It is suitable for scientific research and teaching demonstration on heart rate and blood oxygen, and is also very suitable for secondary development. The MAX30102 provides a complete system solution to ease the design-in process for mobile and wearable devices. The MAX30102 operates on a single 1.8V power supply and a separate 5.0V power supply for the internal LEDs. Communication is through a standard I2C-compatible interface. The module can be shut down through software with zero standby current, allowing the power rails to remain powered at all times. Features: Can be used with free Algorithm Highly integrated. Small-size sensor Non-chest based heart rate/SpO2 detection Ultra-low power consumption Specifications: Circuit board size: 15x20mm Circuit board thickness: 2.5mm Module function: measure heart rate, measure blood oxygen concentration, measure temperature supply voltage: 1.8v-5v Detection signal type: light reflection signal (PPG) Output signal interface: 12C interface Communication interface level: 1.8/3.3v optional Peak wavelength of red LED: 650nm-670nm Peak wavelength of infrared LED: 870nm-900nm Interface description: VIN: power inlet, 1.8v-5v SCL: clock of 12C bus SDA: 12C bus data INT: interrupt pin RD: output 2.8v, drive infrared LED RD: output 2.6v, drive red LED GND: grounding. Principle of Working: There are three traditional methods of pulse measurement: one is the extraction of ECG signals; Second, the pulse rate is calculated from the fluctuation measured by the pressure sensor during the measurement of blood pressure. Third, the light volume method. The first two methods of extracting signals restrict the patient’s movement, and if used for a long time, it will increase the patient’s physical and psychological discomfort. As one of the most common measurement methods in monitoring measurement, the optical volume pulse measurement has the characteristics of simple method, convenient to wear and high reliability. The basic principle of light volume method is to measure pulse and blood oxygen saturation by using different light transmittance caused by vascular pulsation of human tissues. Secure to client’s finger, wrist, or earlobe by bandage or clip. When measuring blood oxygen saturation, according to the oxygen hemoglobin (Hb02) and hemoglobin (Hb) to infrared light, infrared light absorption to calculate. Blood vessels dilate and contract with the heartbeat, when diastolic blood volume, absorption of red and infrared light more, when systolic, blood volume less, absorption of red and infrared light less. Heart rates can be calculated based on periodic changes in the amount of light reflected to the sensor. Formula for calculating blood oxygen saturation. Directions for use: 1) The module’s 12C communication interface is compatible with 1.8v /5V and can communicate with most conventional development boards. 2) The 1.8v /5V level can be selected by the solder joint on the module. As shown in the figure below, the middle of the solder joint is the common point and the two sides are the selected level connection points. The product is connected to 3.3v by default. manual
RM10.00
Feature: Automatic Charging: The internal resistance and leakage resistance of the battery are automatically charged, which is convenient and efficient, saving a lot of time and labor costs, very useful. Protection Function: This battery charger module is set to be used to defend the battery voltage below the input voltage and battery short circuit, for safety reasons. Adaptable Ability: The battery charger module is adaptable to the input power supply and has certain driving ability, which is very flexible and durable. Basic Values: Input voltage is DC 3‑6V, recommended DC 3.7V 5V, charging voltage is 12.6V(3S)/16.8V(4S), if you happen to have related needs then this one is suitable for you. Easy to Carry: Easy to carry, you can carry this module around with you at any time when you need, you can easily store and won't take up too much space. Specification: Item Type: Battery Charger Module 3 Cell(3S) 12.6V Version: Input Voltage: DC 3-6V (DC 3.7V 5V recommended) Charging Voltage: 12.6V 4 Cell(4S) 16.8V Version: Input Voltage: DC 3-6V (DC 3.7V 5V recommended) Charging Voltage: 16.8V Package List: 1 x Battery Charger Module
RM15.00
Description: BFD-1000 is a cost-effective, multi-functional tracking module created by NewWay Electronics for those who want to make tracking robots. This module is sufficient for daily tracking tasks, and it also has an infrared distance detection sensor. , The touch detection sensor enables the robot you design to adapt to more situations. BFD-1000 is specially designed for black (white) line search. It is especially suitable for the detection of complex black and white lines and cross black and white lines. It has 6 high-sensitivity infrared sensors (5 patrol lines, 1 barrier), It can accurately identify black and white lines. Features: BFD-1000 integrates 5-channel high-sensitivity tracking sensor, which has little impact on the environment, can accurately track complex black lines (white lines), and is more comfortable with simple black line tracking. BFD-1000 integrates an infrared barrier sensor, and the barrier distance can be adjusted by sliding rheostat. BFD-1000 has a specially designed touch detection sensor, which makes the design of the shuttle robot easier. All the output signals of BFD-1000 are digital signals (high and low level), which is convenient to connect with the MCU. The output status of all sensors of BFD-1000 has LED lights as indicators, which is convenient for debugging. BFD-1000 supports a voltage of 3.0-5.5v to meet most system requirements. Using a high-sensitivity sensor, the tracking range can be arbitrarily changed between 0.5mm-40mm without any adjustment. Specifications: Detection distance: 0-4 cm (black and white line sensor), 0-5 cm (adjustable distance detection) Input voltage: 3.0-5.5V Output form: digital output (high and low level)
RM34.00
This 20 character by 4 line display has a very clear and high contrast white text upon a blue background/backlight. It also includes a serial I2C/IIC adaptor board pre-soldered to the back of the LCD. This means it can be controlled with just 2 I2C serial data pins (SDA & SCL) and so requires far less digital IO pins when controlled from a microcontroller. In total the module only requires 4 wires including 5V power and GND. Contrast adjustment is also provided by the daughter board via a potentiometer. These modules are currently supplied with a default I2C address of either 0x27 or 0x3F. To determine which version you have check the black I2C adaptor board on the underside of the module. If there a 3 sets of pads labelled A0, A1, & A2 then the default address will be 0x3F. If there are no pads the default address will be 0x27. The module has a contrast adjustment pot on the underside of the display. This may require adjusting for the screen to display text correctly. Note: If pressure is applied to the I2C daughter board it is possible for it to bend and come contact with the LCD module. Please ensure when the LCD is installed in your application that no external object is applying pressure to the back of the module. Features For all standard 5V 16 Chars, 2 Lines and 20 Chars, 4 Lines LCD PCF8574T / PCF8574 Driver Potentiometer for Contrast Disable Backlight by jumper Connector Pins: SDA / SCL / VCC / GND Arduino-Library LiquidCrystalI2C available Arduino IDE Example Size: 40mm x 18mm Connect I2C Driver Module to an Arduino For this experiment it is necessary to download and install the “Arduino I2C LCD” library. First of all, rename the existing “LiquidCrystal” library folder in your Arduino libraries folder as a backup, and proceed to the rest of the process. Arduino Sketch: #include <Wire.h> // Include Wire.h to control I2C #include <LiquidCrystal_I2C.h> //Download & include the code library can be downloaded below LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3, POSITIVE); // Initialize LCD Display at address 0x27 void setup() { lcd.begin (16,2); } void loop() { lcd.setBacklight(HIGH); //Set Back light turn On lcd.setCursor(0,0); // Move cursor to 0 lcd.print("QQtrading - TEST"); lcd.setCursor(0,1); lcd.print("Ideas Comes Real"); } If you are 100% sure that everything is okay, but you don’t see any characters on the display, try to adjust the contrast control pot of the backpack and set it a position where the characters are bright and the background does not have dirty boxes behind the characters. Still not working? You will need to find the I2C address by yourself by running an I2C scanner: //Written by Nick Gammon // Date: 20th April 2011 #include <Wire.h> void setup() { Serial.begin (115200); // Leonardo: wait for serial port to connect while (!Serial) { } Serial.println (); Serial.println ("I2C scanner. Scanning ..."); byte count = 0; Wire.begin(); for (byte i = 1; i < 120; i++) { Wire.beginTransmission (i); if (Wire.endTransmission () == 0) { Serial.print ("Found address: "); Serial.print (i, DEC); Serial.print (" (0x"); Serial.print (i, HEX); Serial.println (")"); count++; delay (1); // maybe unneeded? } // end of good response } // end of for loop Serial.println ("Done."); Serial.print ("Found "); Serial.print (count, DEC); Serial.println (" device(s)."); } // end of setup void loop() {} Then open the serial monitor and select 115200 baud to get the address. Find your sketch: LiquidCrystal_I2C lcd(0x27); Replace 27 to your module address. Some change to 3F will do LiquidCrystal_I2C lcd(0x3F);
RM50.00
Description: Ens160 is a digital multi gas sensor specially designed for indoor air quality monitoring. It can best detect a variety of gases and volatile organic compounds (VOCs), including toluene, hydrogen, ethanol, NO2 and ozone. The air quality sensor is used for home and building automation, consumer goods, electrical appliances and air purification Detection of reducing (VOC) and oxidizing gases (such as NO2) MOX supports up to 4 independent gas sensors Integrated sensor measurement and heater drive control Integrated pre calibrated sensor fusion and automatic baseline correction algorithm Multiple IAQ outputs (TVOC, ec02, AQL) 12C and SPI interface < 1 minute warm-up < 1 hour start High resistance to siloxane and humidity Benefit: Ease of use. Selection of multi standard air quality signal Easy integration. No software library is required, which has no impact on the host CPU Ideal for fast response systems Safe use of daily necessities Suitable for flexible and robust design Product characteristics: Ambient - 40 to + 85 ° C / 5 to 95% RH VDD1. 71 to 1.98v
RM8.00
Description: TP5100 is a Lithium battery management chip. It is capable of charging a single lithium-ion cell or two lithium-ion cells wired in series at the same time. It is designed for a double 8.4V / 4.2V single lithium-ion battery. This Li-ion Battery charging module comes in a small package making it ideal for portable devices. It has an in-built input overcurrent, under-voltage protection, over-temperature protection, short circuit protection, battery temperature monitoring, and reverse battery protection. Technical Specifications: Dual-cell 8.4V/Single-cell 4.2V Input voltage: 5V-15V DC Switching frequency: 400kHz Red LED: Charging indicator Blue LED: Full charge/ No battery indicator Both Red/Blue LED off: VIN very low/High-temperature shutdown No need for external anti-backflow Schottky diode Onboard solder jumper to set 1S/2S mode Option for an external bicolor LED Additional Resources: TP5100 8.4V/4.2V Li-ion Battery Charging Module datasheet (https://voltiq.ru/datasheets/TP5100-datashhet.pdf ) TP5100 1S/2S Li-ion Battery Charger – Quick Review! (https://www.codrey.com/electronic-circuits/tp5100-1s-2s-li-ion-battery-charger-quick-review/ )
RM245.00
Product Description: Name of the product: Soil pH sensor Probe type: probe electrode Measurement parameters: Soil pH value Measuring range: 3 ~ 9 pH measurement accuracy: ±0.3PH Resolution: 0.1pH output signal: RS485 Supply voltage: 9 ~ 24VDC Operating temperature range: 0°C ~ 55°C Stabilization time: 5-10 seconds after power Reaction time: <1 second sealing material: ABS engineering plastic, epoxy resin waterproof grade: IP68 Cable specifications: Standard 1.2 meter (can be customized for other cable lengths, up to 1200 meters)
RM135.00
Product Description: Name of the product: Soil moisture sensor Probe type: probe electrode Measurement parameters: Soil moisture Measuring range: 0 ~ 100% measurement accuracy: 0-50%: ±2% 50-100%: ±3% Resolution: 0.01% output signal: RS485 Supply voltage: 9~24VDC Operating temperature range: -40°C~85°C Stabilization time: 5-10 seconds after power Reaction time: <1 second sealing material: ABS engineering plastic, epoxy resin waterproof grade: IP68 Cable specifications: Standard 1.2 meter (can be customized for other cable lengths, up to 1200 meters)
RM165.00
Product Description: Name of the product: Soil NPK sensor Probe type: probe electrode Measurement parameters: Soil NPK value Measuring range: 0 ~ 1999 mg/kg measurement accuracy: ±2%FS Resolution: 1 mg/kg output signal: RS485 Supply voltage: 9~24VDC Operating temperature range: -30°C~70°C Stabilization time: 5-10 seconds after power Reaction time: <1 second sealing material: ABS engineering plastic, epoxy resin waterproof grade: IP68 Cable specifications: Standard 1.2 meter (can be customized for other cable lengths, up to 1200 meters) Measure Soil Nutrient using Arduino & Soil NPK Sensor
RM120.00
The electronic ink screen uses the "microcapsule electrophoresis display" technology for image display. Its working principle is that the charged nanoparticles suspended in the liquid undergo the action of an electric field to migrate, and reflect under ambient light to form a display effect close to that of traditional printing paper. The electronic ink screen can clearly display the picture without a backlight, and the viewing angle is almost 180°. Specifications: MH-ET Live: Waveshare 3 color display equivalent Electronic Paper Module for Arduino / Raspberry Pi Low Power Consumption Wide Viewing Angle Three Color Display 3 Wire and 4 Wire SPI Communication 212 X 104 resolution Size: 71.6mm X 38.3mm Operating voltage: 3.3V / 5V Tutorial
RM6.00
WS2812 is a intelligent control LED light source that the control circuit and RGB chip are integrated in a package of 5050 components. It internal include intelligent digital port data latch and signal reshaping amplif ication drive circuit. Description: Chip: WS2812 (built-in LED) LED: 5050 RGB full color highlight package Voltage: 5V Port: Digital Platform: for Arduino and Raspberry Pi microcontroller 5050 highlight LED, built-in control chip, only an IO port to control multiple LED Chip built shaping circuit, signal distortion is not cumulative, stable display Adjust brightness tricolor 256, 16,000,000-color TFT display, scanning frequency of not less than 400Hz / S Serial even level interface, via a signal line to complete the reception and decoding of data Refresh rate of 30 frames / sec, even low-level mode even series of not less than 1024 points Send and receive data at speeds up to 800Kbps Highlight LED, light color high brightness consistency Both ends even level interface, can be connected directly 8-Bit: Length: 57.1mm Width: 10.6mm Weight: 3g 16-Bit (4x4): Length: 30.3mm Width: 30.3mm Weight: 6g 25-Bit (5x5): Length: 38.9mm Width: 38.9mm Weight: 8g Tutorial: How to Control WS2812B Addressable RGB LEDs using Arduino
RM38.00
Features With a wide input voltage range from 6V to 40V, the step-down converter can accurately adjust output voltage and current. The efficiency can be up to 96%, measured at 20A, converting 24V to 12V. It is designed with 75V/80A large current dual MOS tube. Input and output use high frequency low resistance electrolytic capacitor, low ripple, stable output. Wiring is convenient with these large current 30A screw terminals. The buck module has 2 heat sinks that could enhance heat dissipation. When there is a big difference between input and output voltage, please decrease power and current. Specifications Input Voltage: 6V to 40V DC(10V to 40V is suggested) Output Voltage: 1.2V to 36V DC Output Current: 20A(max.), 15A(suggested) Efficiency: 95%(24V to 12V, 20A) Output Ripple: ≤50mV Wiring Method: Terminal Short Circuit Protection: Self-recovery(cannot short circuit for a long time) Size: 60 x 53 x 27mm / 2.36 x 2.08 x 1.06" When input and output are commonly grounded, no-load CV output constant voltage, CC output constant current Output current adjustment method: Adjust the CV potentiometer and set the output voltage to the voltage you need according to your load requirements. Set the CC potentiometer counterclockwise for about 30 turns (ie set the output current to the minimum), connect the LED, and adjust the CC potentiometer to the current you need. For battery charging, after the battery is discharged, it will be connected to the output and adjust the CC to the current you need. (Be sure to use the discharged battery when charging, because the battery is left in the battery.) More, the charging current is smaller.) VO+: Output positive VO-: Output negative +IN: Input positive -IN: Input negative CV: Output voltage adjustment CC: Output current adjustment EN: Enable, low voltage level shut off output; suspension, high voltage level is effective
RM1.50
Donut (Perf) board is designed to map out circuit ideas as an alternative to breadboard or soldering. Components can be tied or fixed to the holes and interconnected with hook-up wires to form the circuit. Features Prototype circuit ideas quickly and easily Matrix board enables components to be set using pins and wires by hand SRBP base material is very easy to cut to the required size with simple tools Specifications Material: Fiber Glass-Reinforced Epoxy Board Double Sided (Individual hole) Hole-to-hole distance: standard 100mil or 2.54mm (pitch-to-pitch) Color: Green All holes are plated through. All holes are thorough, smooth, and clear. Suitable for large, medium, and small projects, widely used for Arduino, various electronic and welding projects, ideal circuit boards for electronic DIY enthusiasts.
RM48.00
The EMI filter PCB specification is FR4 50X50X1.6MM, which can be combined into a multi-stage EMI filter, the shortest design of the large current line, the short path, can withstand larger currents, and has less interference to the outside world, which is better than the design of the general long stripboard. The 50X50MM square plate has high mechanical strength, is not easy to bend and deform, and it is convenient to add a shielding cover. Common mode inductors have three specifications of 2A, 4A, and 18A. 18A: EMI filter, load power 3960W. This module can be used with a decoder or a power amplifier to filter the high-frequency noise of the power supply, eliminate interference from the mains, and purify the power supply. It can significantly improve the sound quality of the power amplifier, increase the resolution and make the background quiet. The input GND needs to be connected to the ground wire of the power cord, and can also be connected to the chassis shell. Depending on the specific situation, please pay attention to the direction when soldering the 4A common mode inductor. Please install and solder according to the label on the circuit board and the baby picture. The following are some common sense of high-frequency electromagnetic interference EMI filters. For high-frequency electromagnetic interference (EMI), generally, three technologies can be used for power filtering to suppress interference noise. In actual use, two or even multiple technologies are often mixed. They are: 1. Add a capacitor between the live wire and the neutral wire of the power supply, that is, the X capacitor. Choose X2 type, the main function is to eliminate common mode interference, the capacity range is 0.01UF---0.47UF. 2. Add a capacitor between the power line and the ground line, that is, the Y capacitor. The Y2 type is selected to mainly eliminate the interference of cross-talk, and the capacity range is 2200pF~0.1μF. In order to reduce the leakage current, the capacitance should not exceed 0.1μF, this circuit board chooses 0.01UF. 3. Common mode suppression, common mode inductance (suppression coils on the two power lines), when the rated current is large, the wire diameter of the common mode choke coil should be correspondingly increased so as to be able to withstand a large current. In addition, an appropriate increase in inductance can improve the low-frequency attenuation characteristics. This line uses 10MH
RM7.00
Description DC power supply filter board Digital power amplifier interference suppression board Automotive power supply EMI suppression, current 4A, can meet The current of the TPA3116 machine makes the power input more pure, so the amplifier is less noisy. Product parameters: Working voltage: 0-50V Pin definition, interface description: Vin+: input positive end Vin-: input negative Vout+: output positive end Vout-: negative output
RM14.00
EMI filter module is a filter module that can let the useful low-frequency signal pass smoothly and weaken the high-frequency electromagnetic interference. It can improve the sound purity, reduce the noise generated by ac power interference. Filtering voltage: 220V Maximum current: 2A Specification: Model Number: EMI Filter Sound Booster Application: Electronic experiment Operating Temperature: -40℃ ~ +85℃ Supply Voltage: 220V Dissipation Power: 2A Product Interface Description:
RM30.00
Features: Wide range of applications: DIY self-made spray, plant humidification, landscaping atomization Large fog volume, fine fog particles, high fog spray A variety of spray modes, switch at will, suitable for different functional needs Reasonable circuit board design, original electronic components, stable performance Double spray head design, large fog volume and wide coverage Product parameters: Name: Atomization drive circuit board Rated voltage: DC 5V Rated current: 300mA Power: 2-3W Resonant frequency: 108-110KHz Precautions: Do not modify the circuit board without permission Do not overload input power The circuit board should not be exposed to water and damp Must be used together with the same frequency atomizing tablet Shipping list: Driver board * 1 Atomizer tablet* 2 Cotton swab* 2
RM50.00
This ultrasonic fog module can be easily used to create fog. To make the fog, the stick must be placed in water with one side and the piezo disc must be held on the other end. Specifications: Supply voltage: 5V DC Current draw: ~300mA Vibration frequency: 108KHz±2KHz Dimensions PCB: 50 x 25mm Shipping list: Driver board * 1 Atomizer tablet* 4 Cotton swab* 4
RM4.00
Description: The TP4056 is a complete single-cell Li-Ion battery with a constant current/constant-voltage linear charger. The SOP40 package with the heatsink on the bottom of the TP4056 and fewer external components make the TP4056 ideal for portable applications. The TP4056 is suitable for USB power and adapter power supplies. Due to the internal PMOSFET architecture and anti-reverse charging path, no external isolation diodes are required. Thermal feedback automatically adjusts the charge current to limit chip temperature during high power operation or high ambient temperature conditions. The charging voltage is fixed at 4.2V, and the charging current can be externally set by a resistor. When the charging current drops to the set value of 1/10 after reaching the final float voltage, the TP4056 will automatically terminate the charging cycle. When the input voltage (AC adapter or USB power) is removed, the TP4056 automatically enters a low current state, reducing the battery leakage current to less than 2uA. The TP4056 can also be placed in shutdown mode when there is a power supply, reducing the supply current to 55uA. Other features of the TP4056 include battery temperature sensing, Undervoltage lockout, automatic recharge, LED status pins for charging, and termination. Specification: 100% brand new and high quality Size: approx.28x17.3x1mm Charge module: Linear charging. Current:1A adjustable. Charge precision:1.5%. Input voltage:4.5V-5.5V. Full charge voltage:4.2V ± 1% Led indicator: red is charging Green is fully charged. Input interface:micro USB/mini usb/type-c usb Work temperature:-10° to +85°. Inversed polarity: NO. The battery overcharge protection voltage: 4.28 V Battery overcharge lifting voltage: 4.00 V The battery discharge protection voltage: 3.0 V Battery discharge termination voltage: 3.2 V Battery: over-current protection current 3 a Ampere meter can only be connected to the 5v input end of the module. It is better than the charging current is 37% of the battery capacity. If you charge the battery of 1000mAH, the current of 400 is enough. If the input voltage is too high, like 5.2v, the current will be less than 1000mA, it is normal. It is a protection function, auto-subtract the charging current to avoid burn damage to the chip. NO reverse polarity protection. Suitable for: Charge and Discharge Lithium cells Commonly used with 18650 Li-ion batteries Portable electronics Power banks Used with 5V booster for powering Arduino projects Package Included: 5V 1A USB Type C Lithium Battery Charger TP4056 with Protection IC x 1 Suggestions Battery Holder 18650 3.7V (1x2) Case w/ Wire Lead Lithium Ion (Li-ion) 18650 3.7V 4800mAh Rechargeable Battery
RM40.00
This is an ultrasonic mist maker/humidifier also called an ultrasonic atomizer used to generate mist and eliminate bad smell. This mist maker can add a stunning mist effect to your pond or water tank to filter the bad smell with electronic and ultrasonic technology. Atomized mist is generated in a large amount and the service life of atomizer is long. Ideal of good decorative effect, in the rockery, fountain, potted landscape. Great for you to buy one. Features: No heat or chemicals used. Ideal for indoor or outdoor fountains, water feature, and office use. Easy to operate, put in the water and the voltage is 24V, then the mist appears. Perfects for use it in your pond, rockery, fishtank, vase, birdbath, etc, then it will create a magical atmosphere. This mist maker can add a stunning mist effect to your pond, rockery or water tank to filter the bad smell with electro and ultrasonic technology. Specifications: Operating voltage: 24 (V) Power: 19 (W) (sign 1W) Atomization amount:> 400cc / har Operating frequency: 1700 ± 50 (KHZ) Transducer plates diameter: 2cm Effective level: 20mm ~ 75mm Working temperature: 5 ~ 45 Celsius Lantern: No light water level sensor switch: Font door high H1.2cm Atomizing head diameters: 4.5cm High: 3.5cm Plug Type: 5.5 × 2.1mm female plug Suitable For: Family, air-conditioned rooms, beauty salons, hotels, hospitals, offices, kindergartens and other living spaces. Points for attention: 1. Do not turn over the mist maker when the switch is turned on, keep upright, or it may damage the atomizer. 2. Please ensure that the daily running time is less than 10 hours, otherwise the life of atomizing slice will be shorted. 3. Don't touch the atomizing slice while the Mist Maker is working. 4. Ensure the water at high quality, use clean tap water (water quality deterioration may influence the lifetime). 5. Please switch off the power before Movement or maintenance. 6. The atomizing slice is consumable, and its service life is=3000 hours. If marked reduction of Mist present, please clean atomizing slice with a cotton swab (don't need to use any detergent), keep it clean.