Specification Brand MoesHouseCarbon Dioxide Range 400 5000 ppm ± 50ppm 5 Temperature Range 10°C 40°C ±2℃ 14℉ 104℉ ±3 6℉ Humidity Range 20 80 RH ±5 RH Product Size 98 90 40 mmPower Supply Built in Lithium Battery 2400mAh Wireless Connection Wi Fi bluetooth only for 2 4GHz Wi Fi network Input 5V⎓1AFeatures 1 3 in 1 Multifunctional Carbon Dioxide Meter The 3 in 1 CO2 monitor can detect real time CO2 concentration together with clear display on indooroutdoor humidityand 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 2 CO2 Concentration StageSound Alarm This CO2 detector is functional with 3 stages of CO2 concentration normal stage 400 700 ppm warning stage 700 1500 ppm and dangerous stage 1500 5000 ppm and will alarm when the detected CO2 concentration is beyond the safe value you customized to monitor house security for you timely Besides this air tester is designed with calibration function for more accurate monitor 3 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 at home no more worry about sudden accid