3 in 1 Multifunctional Carbon Dioxide Meter The 3 in 1 CO2 monitor can detect real-time CO2 concentration, together with clear display on indoor&outdoor humidity and temperature for extremely comfortable and safe life experience. CO2 detection range is featured from 400 to 5000PPM, temperature detection range from 0 to 50 and 0-99%RH for humidity detection range,fits well for agricultural planting, production warehouse, raw material processing, home, school, office, and other occasions. CO2 Concentration Stage & Sound Alarm This CO2 detector is functional with 3 of CO2 concentration-normal stage (400-700 ), warning stage (700-1500 ), and dangerous stage (1500-5000 ) and will alarm when the detected CO2 concentration is beyond the safe value you customized to monitor house security timely.Besides,this air tester is designed with calibration function for more accurate monitor. Compatible with Tuya Smart/Smart Life APP Intelligently monitor your house air condition for CO2 concentration,temperature and humidity value on smart phone via Tuya Smart APP when you are not ,no more worry about sudden accidents.And you can transfer the Temp. valve between and easily in APP or directly via the button on the detector. Smart Scene Linkage Automation Add smart scenes in Smart Life APP for automating other smart home devices with the CO2 detector under CO2 concentration,temperature and humidity value,such as automatically open your window when the detected CO2 concentration is beyond the safe value,or turn on the AC when the temperature is too high. Full-Color Screen& Capacity Rechargeable Battery Full-color display and screen design ensures its super easy readings with LED digital display for eye protection; built-in capacity rechargeable battery whose standby up to 40hours Specification: Carbon Dioxide Range: 400 ~ 5000 [(50ppm + 5%)] Temperature Range: -10C ~ 40C (2) / 14 ~ 104 (3.6) Humidity Range: 20 ~ 80 % RH (5 % RH) Product Size:98 x 90 x 40 mm Power Supply:Built-in Lithium Battery (2400mAh) Wireless Connection: Wi-Fi (only for 2.4GHz Wi-Fi network) Input:5 V1 A Colour: Black Material: ABS Package Contents: 1 x CO2 Detector 1 x TYPE-C Charging Cable Only the above package content, other products are not included. Note: Light 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.