and High Quality!This product needs to be used with ZigBee 3.0 !Smart box is the home of intelligent device for remote monitoring of 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 conditioning, new fan, humidifier, purifier on household environment optimization.The detection range of the smart box: formaldehyde, VOC gas, CO2, temperature, humidityExamination 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 products. For example, when detecting excessive formaldehyde/VOC, the smart purifier is automatically turned on; when the carbon dioxide is exceeded, the smart fan is automatically turned on; when the temperature is abnormal, the 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 product)Working temperature: -20--85Working current: 10-496ma supply mode: USB 5V/1AWorking voltage (rated): 4.8-12VCommunication protocol: ZigBee3.0Size: 90x90x35mmcolor:WhiteMaterial:absPackage Contents:1 x smart box1 x English manual1 x Card pin1 x USB supply cableOnly 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.