Feature: 1. Realtime Display: This CO2 air quality monitor can do realtime display and shows carbon dioxide concentration per cubic meter. 2. LCD Large Screen and LED Digital Display: Our CO2 monitor is with LCD large screen, LED digital display. Value flashing indicates the range level. 3. Air Convection Detection Technology: This TVOC temperature humidity monitor meter is using air convection detection technology. 4. NDIR Sensor: Temperature humidity monitor make you see realtime monitoring data of temperature, humidity and CO2. Dual channel temperature NDIR sensor. 5. Wide Application: This CO2 air quality monitor detector is suitable for home, factory, office building, restaurant, hotel, and so on. 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 Testing Accuracy: ±2% Operating Voltage: 5V Power Supply Interface: Type C Battery: AA x 3 (Shipped Without Battery). Package List: 1 x Air Quality Monitor1 x Instruction Manual1 x Type C Line Note: Use standard DC5V power supply.