Smart Home Smart Life Wifi Smart Air Quality Sensor Co2 Temperature And Humidity Sensor Tuya Detector Air Quality Monitor New WiFi Smart CO2 detector CO2 Sensor 40010000 ppm Accuracy: (50ppm + 5% reading value) Humidity sensor: 0~100%RH Accuracy 2%RH(25) - 40~+85 Accuracy 0.3 Communication protocol: WiFi APPS: Tuya Smart & Smart life Specifications: 1.[PREMIUM DETECTOR]This multifunctional air quality detector can accurately detect the current CO2 concentration,temperature, and humidity in the air. It can help you understand indoor air quality at a glance. 2.[CO2 CONCENTRATION STAGE & SOUND AL ARM] This CO2 detector is designed with 3 stages of CO2 concentration-normal stage (0-800 ppm), warning stage (800-1200 ppm), and dangerous stage (1 200-5000 ppm). It will alarm you when thedetected CO2 concentration is beyond the safe value you customized. 3.[CONVENIENT CAL IBRATION] To ensure the accuracy of measurement, this CO2 monitor supports the calibration function.Press One buttons three times in an open environment and let it stand for 200 seconds to calibrate this CO2 meter easily. 4.[WIDE APPLICATION] A hanging hole is designed on the back of this portable CO2 detector so that you can hang it up to the wall for easy viewing. The indoor CO2 meter is ideal for use in grow room, offices, kitchens, schools, kitchens, schools cellars,and cars. Package Included: 1*WiFi Smart CO2 detector 1*instructions