[ Air Quality Tester]: This detector can be used to test and display the concentration of PM1.0, PM2.5, PM10, CO2, TVOC, HCHO, temperature and humidity at the same time. And also has WiFi function. [Sleep & Approach ]: The screen can be automatically turned off to reduce energy consumption after no operation,and sensor can still transmit data to the cloud through WIFI when the screen is off,and you can view the real-time values through the APP.This product contains a distance sensor,in the dormant state(dormancy after without sensing,you can close this function in the APP)you can approach the product directly or beckon it in front of the product to wake up the screen. [Cellphone Tuya APP Control]: Search for Tuya APP in the application program, the device enter the pairing state after the firsttime opening, and you can view the specific data on the APP after completing the connection. (Because it takes time to upload data, it is normal for the APP data to deviate from the real-time data of the detector.) [Parameters Setting]: Support to set the PM2.5 & CO2 alarm value, alarm sound, temperature unit switching, screen off function switching and screen off time setting in the settings page. [ Air Quality Level Indication Function]: It change the signal color according to the air quality index, and allowing you to more accurately and more graphic know the current air conditions. [Strong Heat Dissipation]: Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect. Specifications: Display: LCD color display Recharging method: Type-C interface Colour:White Material:ABS Package Contents: 1 * Air Quality Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.