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--85 Working voltage (rated): 4.8-12V Working current: 10-496ma Power supply mode: USB 5V/1A Communication protocol: WIFI 2.4GHZ Examination range: Formaldehyde: 0-10.0 (mg/) VOC: 0-99.9 () Carbon dioxide: 0-1000 () Temperature: 0-60 () Humidity: 0-95 (%) type: Zigbee Colour:White Material:PVC Size:90 x 90 x 35mm Package Contents: 1 x Smart air box 1 x USB power supply cord Only 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.