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 MonitorMaterial: PC, ABSDetection Technology: Air Convection Detection TechnologyDisplay Mode: LED Digital Display, LCD Screen, BacklightApplicable Temperature: 0-50Carbon Dioxide Detection Range: 400-5000ppmTVOC Detection Range: 1ppmHumidity Testing Accuracy: 2%Operating Voltage: 5VPower Supply Interface: Type CBattery: AA x 3 (Shipped Without Battery).Package List:1 x Air Quality Monitor1 x Instruction Manual1 x Type C LineNote:Use standard DC5V power supply.