Tuya Wifi Air Quality Monitor Smart Home CO2 Detector Formaldehyde VOC CO2 CH2O Temperature Humidity This smart home 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/m3) VOC: 0-99.9 (ppm) Carbon dioxide: 0-1000 (ppm) Temperature: 0-60 (℃) Humidity: 0-95 (%) type: Zigbee/Wifi 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.