Feature: 1. Comprehensive Monitoring: Measuring CO2, HCHO, TVOC, temperature and humidity, providing comprehensive analysis of indoor air quality to meet most indoor testing needs. 2. 2.8-inch TFT Color screen: Equipped with a 2.8" TFT color digital display screen, it clearly shows real-time air quality readings for easy understanding and tracking of changes. 3. Easy to Use: Our indoor air quality monitor comes with a built-in 1200mAh rechargeable lithium battery and USB charging cable. It lasts 5-6 hours on a single charge and is recommended to be kept charged if you need to monitor your indoor environment for extended periods of time. 4. Safe Design: Ventilation holes design can make the device better heat dissipation during operation, preventing the device from overheating, and more accurate measurement data. 5. Wide Application: This portable intelligent home air quality meter can detect air quality in bedrooms, living rooms, kitchens, cellars, cars, grow tents, offices, schools, hotels and more. it can be placed on the desktop for easy viewing, is an ideal indoor air quality detector for our lives. Specification: Specifications: Color: Black / White (Optional) Model: ZN-MT25 Material: ABS Operating Voltage: 5V Charging Method: USB 500mA Type-C port Charging Time: About 4h Standby Time: About 300-360 minutes (built-in multiple sensors, power consumption) Battery Capacity: 3.7V, 1200mAh lithium battery Item Size: 9 * 7 * 3.5cm / 3.54 * 2.76 * 1.38in Item Weight: 119g / 4.2oz Package Weight: 176g / 6.21oz Package Size: 14.1 * 9.8 * 4.8cm / 5.55 * 3.86 * 1.89in Package List: Package List: 1 * Air Quality Tester 1 * Charging Cable 1 * Packaging Box 1 * User Manual (English)