We all know that the quality of air is very vital to our health, this product allows you to have a comprehensive understanding of your current environment. You can use it in your home, office or wherever you want to monitoring the air quality, come and try it, it will not let you down. Features: 7 In 1 Monitoring: This air quality detector can detects the PM2.5, TVOC, CO2, HCHO, temperature, humidity and AQI for you. Alarm threshold funciton, you can set the value by yourself and it will alarm you when the detected data over the value. Wide Application: You can use this product for home air detect, car air detect, office air detect, hotel and so on. Built-in large capacity lithium battery to supplys power, so you can recharge it in time. History Viewing: You can press the "on/off" button to enter the history interface and view the history data. For Tuya WiFi version: This version supports mobilephone APP remotes viewing and setting, also has the calendat and alarm clock function. (Only Tuya WiFi version) Specifications: Material: ABS Color: black, white (optional) Type: Tuya WiFi version, No WiFi version (optional) PM2.5 Measuring ranges: 0-9999ug/m3 Resolution: 1ug/m3 TVOC Measuring ranges: 0~3mg/m3 Resolution: 0.001mg/m3 CO2 measuring ranges: 400-5000PPM HCHO measuring ranges: 0-3mg/m3 Resolution: 0.001mg/m3 Temperature measuring ranges: 0~60 Humidity measuring ranges: 0~99%RH Battery: 1 * lithium battery, 1200mAh (included) Package size: 120 * 110 * 50mm / 4.7 * 4.3 * 2.0in Package weight; 250g / 8.8ounce Packing List: 1 * Air Quality Monitor (optional)