Indoor CO2 Detector| Air Quality Monitor | Tester for Carbon Dioxide | Temperature and Relative Humidity, Indoor CO2 Monitor with Alarm, for Grow Tents, Wine Cellars, Homes, Cars

Air Quality Monitor CO2 CONCENTRATION STAGE & SOUND ALARM CONVENIENT CALIBRATION LONG BATTERY STANDBY 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. Indoor CO2 Detector| Air Quality Monitor | Tester for Carbon Dioxide | Temperature and Relative Humidity, Indoor CO2 Monitor with Alarm, for Grow Tents, Wine Cellars, Homes, Cars. This CO2 detector is designed with 3 stages of CO2 concentration—normal stage (400-700 ppm), warning stage (700-1500 ppm), and dangerous stage (1500-5000 ppm). It will alarm you when the detected CO2 concentration is beyond the safe value you customized. This multifunctional air quality monitor can accurately detect the current CO2 concentration, temperature, and humidity in the air. It can help you understand indoor air quality at a glance.