and High Quality! This product needs to be used with ZigBee 3.0 gateway! Smart air box is the home of intelligent device for remote monitoring of air environment,It can also detect formaldehyde, VOC of poisonous gas, CO2, temperature, humidity and so on 5 kinds of environmental parameters,In environmental parameters exceed bid automatically when the graffiti smart home air conditioning, fan, humidifier, air purifier on household environment optimization. The detection range of the smart air box: formaldehyde, VOC gas, CO2, temperature, humidity Examination range: Formaldehyde: 0-10.0 (mg/m3) VOC: 0-99.9 (ppm) Carbon dioxide: 0-1000 (ppm) Temperature: 0-60 (℃) Humidity: 0-95 (%) After being paired to the APP, it can be linked with smart . For example, when detecting excessive formaldehyde/VOC, the smart air purifier is automatically turned on; when the carbon dioxide is exceeded, the smart fresh air fan is automatically turned on; when the temperature is abnormal, the air conditioner temperature is automatically adjusted ; When the humidity is too low or too high, the smart humidifier be turned on/off automatically; when a certain parameter is detected to exceed the standard, a message be sent to the alarm (the above smart linkage function needs to be matched with the smart home product) Working temperature: -20--85℃ Working current: 10-496ma Power supply mode: USB 5V/1A Working voltage (rated): 4.8-12V Communication protocol: ZigBee3.0 Size: 90x90x35mm color:White Material:abs Package Contents: 2 x smart air box 2 x English manual 2 x Card pin 2 x USB power supply cable 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.