[A 5-in-1 Multifunction Air Monitor] Air Monitor Lite tests 5 major factors of the indoor air quality: PM2.5 (the result of secondhand smoke), PM10, CO2, temperature and humidity. By knowing the real-time air quality, you can turn on the air purifier or open the window when [High Accuracy and Fast Responding]Inside the air monitor, there are reliable, fast responding and stable sensors from sensor manufacturers. The 5 readings refresh ever second. The air inlet grille design at the back enables sufficient contact between the sensors and the air. The product is NOT waterproof/dustproof, please do not place this product in environment with humidity higher than 90% for long term use. [Clear OLED Display and Sensitive Touch Bar]Pixel style UI design shows on a clear OLED screen, enables bigger visible angle and more fun. Through the multi-colored indicator, you know the air quality, the temperature and the humidity level of your room, with a glance from a distance. You may tap or slide the touch bar on the top to switch the readings as smoothly as to operate screen. [Works with and + app]As this is a Wi-Fi device (2.4GHz Wi-Fi ONLY), you can check data remotely/export historical data on + app (available on / Play). For users, check the 5 metrics remotely or set automation with an home hub; for automation on temperature/humidity, the needs to be upgraded to iOS 15.1 or later, and the hub should be upgraded to the latest version. [Rechargeable Lithium Battery with 7-hour Battery Life]The built-in 2000mAh Lithium battery is with up to 7 hours battery life. We recommend plugging it into power all the time. There is a USB-C cable supplied. IMPORTANT: When running on battery, the default setting is to turn off the product automatically after a few minutes, you can change settings in + app to let it stay on without power supply if, Weight: 0.61508971098 pounds, Manufacturer: NONDK