[Compatible with Tuya Smart/Smart Life APP] When you are not , you can use Tuya Smart APP to intelligently monitor the air condition in your home on your smartphone to understand the carbon dioxide concentration, temperature and humidity values without worrying about accidents. You can switch the temperature valve between and in APP or directly through the button on the detector. [Three in one multi-function carbon dioxide measuring instrument] The three in one carbon dioxide monitor can detect the carbon dioxide concentration in real time, and clearly display the indoor and outdoor humidity and temperature, bringing you an extremely comfortable and safe life experience. The CO2 detection range is 400 to 5000PPM, the temperature detection range is 0 to 50 , and the humidity detection range is 0-99% RH. [CO2 concentration stage and audible alarm] The CO2 detector has three of functions, namely, the normal CO2 concentration stage (400-700 ppm), the warning stage (700-1500 ppm) and the dangerous stage (1500-5000 ppm). When the detected CO2 concentration exceeds your customized safety value, an alarm will be given, so as to monitor safety in a timely manner. [Smart scene link of home automation] Add smart scenes in Smart Life APP to automatically control other smart home devices with CO2 detectors under CO2 concentration, temperature and humidity values, such as automatically opening windows when the detected CO2 concentration exceeds a safe value, or opening air conditioners when the temperature is too high. [Full color screen and capacity rechargeable battery] Full color display and screen design its super easy reading, and LED digital display can protect eyes; Built in capacity rechargeable battery (2400mAh, it can be used for 12 hours without charging when the screen is turned on), and it is used to charge the C-type; Colour:black Material:plastic Package Contents: 1 x co2 detector 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.