Feature: 1. Multifunctional: This air quality detector is multifunctional and is equipped with powerful sensors that can monitor CO2, PM2.5, PM10, PM1.0, humidity and temperature. 2. History Record Function: This air quality detector has a history record function, which supports WiFi connection to your cell phone or laptop (via for TUYA APP), you can view the history record of every time of the day, which is convenient and fast. 3. Built In 3000 mAh Rechargeable Lithium Battery: This air quality tester features a built in 3000 mAh rechargeable lithium battery designed to be taken on the go, allowing you to monitor air quality for hours on a single charge. 4. Excellent ABS Material: This air quality tester is made of excellent ABS material for the shell, which is sturdy and wear resistant, not easy to be damaged and has a long service life. 5. Wide Application: This air quality tester is widely used, and can be used at home, car, office, warehouse, factory, etc. Specification: Item Type: Air Quality Monitor Material: ABS Screen Display: HD LCD Color Screen Temperature Unit: Celsius and Fahrenheit Unit Switching, 24 Hours Real Time Temperature Monitoring. Detection Range: PM2.5, 10, PM1.0 (0-999 ug/M³) CO2 (400-5000 ppm) Detection Temperature and Humidity: -10°C-50°C, 20%-85% Sampling Time: 1.5 Seconds Battery: 1 x 3000mah Rechargeable Lithium Battery ( Shipped With Built In Battery ). Package List: 1 x Air Quality Monitor1 x USB Cable1 x Manual