! This product needs to be used with ZigBee 3.0 gateway!<br> 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.<br> The detection range of the smart air box: formaldehyde, VOC gas, CO2, temperature, humidity<br> Examination range: Formaldehyde: 0-10.0 (mg/m3) VOC: 0-99.9 (ppm) Carbon dioxide: 0-1000 (ppm) Temperature: 0-60 (℃) Humidity: 0-95 (%)<br> After being paired to the APP, it can be linked with various smart home products. 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<br> 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)<br> material: plastic<br> Color as shown<br> Update 1:Visible Air Quality,Air quality level indicator<br> Good air quality shows green light,Severe air pollution shows red light.<br> Update 2:Air pollution exceeing,80 decibels alarm<br> 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<br> Specifications:<br> Working temperature: -20--85℃<br> Working voltage (rated): 4.8-12V<br> Working current: 10-496ma<br> Size: 90 x 90 x 35mm<br> Power supply mode: USB 5V/1A<br> Co