100% New 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, new 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 various 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 will be turned on/off automatically when a certain parameter is detected to exceed the standard, a message will be sent to the alarm (the above smart linkage function needs to be matched with the smart home product) material: plastic Color as shown Update 1:Visible Air Quality,Air quality level indicator Good air quality shows green light,Severe air pollution shows red light. Update 2:Air pollution exceeing,80 decibels alarm If the air pollution exceeds the standard, an 80-decibel alarm will be triggered, and an alarm message will be sent to the mobile phone to link other Tuya devices Specifications: Working temperature: -20--85 Working voltage (rated): 4.8-12V Working current: 10-496ma Size: 90 x 90 x 35mm Power supply mode: USB 5V/1A Communication protocol: ZigBee3.0 Notes: please do not put air box at lampblack is too big, strong convection air or in high concentration organic gas for a long time, otherwise it will damage the sensor. This product needs to be used with ZigBee 3.0 gateway! Package Contents: 1 x Air Quality Monitor 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.