Characteristic: 1. Multifunctional: This air monitor uses semiconductor, infrared and electrochemical detection technology with CO2, TVOC, HCHO PM2.5 and PM10 detection functions. 2. USB Charging: This internal CO2 monitor supports USB charging, 24 hours uninterrupted operation, plug and play operation, without worrying about power outage problems. 3. Accurate control: This air quality tester has holes on both sides and back to produce convection air, which makes real-time convection control more accurate. 4. Excellent ABS material: This air quality monitor is made of excellent ABS material, which is strong and wear-resistant, has a long service life. 5. Backlit LCD Screen: This room air quality meter comes with a backlit screen that provides a clear display and easy readings. . AIR QUALITY MONITOR CARBON DIOXIDE DETECTOR CO2 TVOC HCHO PM2.5 PM10 Specification: Item Type: Air Quality Monitor Material: ABS Detection technology: semiconductor, infrared and electrochemical detection technology Applicable temperature: 0-70 Display Mode: LCD, Backlight Operating Voltage: 5 V Sensor: PM2,5 sensor, semiconductor sensor, electrochemical sensor Battery: Rechargeable lithium battery 1200 mAh x 1 (supplied with built-in battery) PM2,5: 0-999 ug/m3 PM10: 0-999 ug/m3 HCHO: 0-9,999 mg/m3 VOCs: 0-9,999 mg/m3 CO2: 400-5000 PPM . AIR QUALITY MONITOR CARBON DIOXIDE DETECTOR CO2 TVOC HCHO PM2.5 PM10 List of packages: 1 x Air Quality Monitor 1x USB cable 1 x Manual . AIR QUALITY MONITOR CARBON DIOXIDE DETECTOR CO2 TVOC HCHO PM2.5 PM10 . AIR QUALITY MONITOR CARBON DIOXIDE DETECTOR CO2 TVOC HCHO PM2.5 PM10