This is an air detector that can help you check the air condition.It is a good helper for winemaking, greenhouse fruit and vegetable planting, warehouse CO2 detection, etc.Features:Equipped with temperature and humidity sensor Fast and accurate detection. It displays current CO2 data, as well as temperature and humidity data. The colored circles change depending on the carbon dioxide level. Small size and light weight.Easy to carry easy to use No need to calibrate after power on, it works and detects automatically. 2.8 inch LCD screen + backlight display. It can inform your air conditioner condition with accurate data.300~420 minutes long standby timeIt can be used in various occasions such as agricultural planting, greenhouse vegetables, production warehouses, raw material processing, families, educational institutions, VIP sports, offices, etc.Battery: Lithium battery 1200mAHCharging mode: USB 500mA Type C interfaceDetection range: 400~5000 PPM CO2Detection Sensitivity: 1 PPMApplicable Temperature: -1~70Package Size: 140*125*42mm/5.5*4.9*1.7inPackage Weight: 165g/5.8 ozPackage List: 1* Air Detector 1* Instruction Manual 1*USB Cable