It is a air quality detector, using electrochemical detection module, good accuracy, stable performance, strong anti-interference ability, low consumption and long service life. Accurately detect carbon dioxide. Large screen displays power, CO2, [Comprehensive Air Quality Test]: This 6-in-1 air quality tester integrates multiple test functions for measuring CO2/TVOC/HCHO/PM2.5/ CO/PM10 [TFT Color Display & APP Control]: 2.8-inch TFT color screen, you can see the clearly at a glance. With the Tuya APP, enjoy real-time testing and remote management of your home's air quality from anywhere you are. [ Settings & Historical Data Checking]: Supporting customizes alarm limits, sets sleep modes, and effortlessly explores detailed historical data on air parameters by day, month, or year. The app also boasts a user-friendly interface with options for temperature unit switching and versatile timer settings, ensuring a and convenient experience tailored to your needs. Name: Air Quality Tester Battery: 3.7V lithium battery Working voltage: 5V Charging method: USB 500mA Type-C interface Charging time: about 4h Standby time: about 300-360 minutes (built-in multiple sensors, high power consumption) Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Black Material:plastic Package Contents: 1 x 6 In 1 Air Quality Monitor 1 x Bracket 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.