[Comprehensive Air Quality Test]: This 5-in-1 air quality tester integrates multiple test functions for measuring TVOC HCHO Temperature Humidity CO2 Meter, [TFT Color Display & APP Control]: 2.8-inch TFT color screen, you can see the test data 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. [Personalized 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 personalized 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) Battery capacity: 1200mah/2000mah lithium battery 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 5 In 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.