This air detector can detect formaldehyde, VOC, CO2, temperature and humidity and other toxic and harmful gases. Real-time data monitoring is possible when connected to a mobile phone.Notice:This product has no built-in battery, so it needs to be plugged in all the time!Working temperature: -20--85Working voltage (rated): 4.8-12VWorking current: 10-496maPower supply mode: USB 5V/1ACommunication protocol: WIFI 2.4GHZExamination range:Formaldehyde: 0-10.0 (mg/)VOC: 0-99.9 ()Carbon dioxide: 0-1000 ()Temperature: 0-60 ()Humidity: 0-95 (%)type:WifiColour:WhiteMaterial:PVCSize:90 x 90 x 35mmPackage Contents:1 x Smart air box1 x USB power supply cordOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.