Features REAL TIME DISPLAY This CO2 air quality monitor can display real-time and display the concentration of carbon dioxide per cubic meter. 【Large LCD Display & LED Digital Display】Our CO2 monitor is equipped with large LCD screen, LED digital display. The flashing value indicates the range level. Air Convection Detection Technology This TVOC temperature and humidity monitor uses air convection detection technology. NDIR Sensor The temperature humidity monitor allows you to see real-time monitoring data of temperature, humidity and CO2. Dual channel temperature NDIR sensor. Wide Application This CO2 air quality detector is suitable for home, factory, office building, restaurant, hotel, etc. Specification: Item Type: Air Quality Monitor Material: PC, ABS Detection technology: air convection detection technology Display mode: LED digital display, LCD screen, backlight Applicable temperature: 0-50℃ Carbon dioxide detection range: 400-5000ppm TVOC detection range: 1ppm Humidity test accuracy: ±2% Operating voltage: 5 V. Power interface: Type C Battery: AA x 3 (battery not included) Package list: 1 x Air Quality Monitor 1 x instruction manual 1 x Type C Line Note: Use a standard DC5V power supply. Package List 1 x Air Quality Monitor 1 x Instruction Manual 1 x Type C Line