Features Indoor CO2 Monitor: Compact body with hollow back design, easy to carry the airflow. Bright and eye catching LED lights are very convenient for you to read than. Real time monitoring of CO2 content. Air quality monitor is very suitable for interior decor For Tuya APP: When the device is connected to 2.4GHz Wi Fi, hub is not included, you can remotely monitor CO2 indicators on for Tuya APP, send long run and short run CO2 monitoring results directly to your smartphone through WIFI, and easily view CO2 rep Air Quality Monitoring: When carbon dioxide CO2 is low, it is safe to the human body, but when it exceeds a certain amount, it will affect the breathing of the human body and other organisms. Therefore, you must monitor the carbon dioxide content in the Premium NDIR Sensing: The mini CO2 instrument adopts high accuracy NDIR sensor, which can accurately and quickly detect carbon dioxide content. When the CO2 in the air exceeds the set alarm value 1000PPM, it will emit a warning sound, reminding you to op Easy Operation: Every time the CO2 detector is turned on, it needs to be automatically calibrated. Therefore, please place the air quality detector in a ventilated area and calibrate it for 1-2 minutes before the CO2 detector can be used normally. Specification: Item Type: CO2 Detector Carbon Dioxide Detection: NDIR Smart APP Control: WiFi for TUYA app, which transfers data to mobile phones, supports for Android and for IOS phones, and also supports various languages.  Carbon Dioxide Detection Range: 400-5000PPM CO2 Alarm Value: 1000PPM CO2 Alarm On and Off Function: If the you do not like the alarm, press the power button once to turn it off.  Detection Temperature: -10℃ ~ 50℃ Detection Humidity: 20% - 85%RH Storage Temperature: -10℃ ~ 60℃ Battery: 1 x 800mAh rechargeable lithium battery, shipped with built in battery.  Design: Cube shaped with lovely LED light design.  Color Changes of Different Carbon Dioxide Values: Air Quality Level: Good CO2 Concentration: 400-1000PPM Led Color: Green Air Quality Level: Ok CO2 Concentration: 1001-2000PPM LED Color: Yellow Air Quality Level: Poor CO2 Concentration: 2001-5000PPM LED Color: red Package List: 1 x CO2 Detector 1 x USB Cable 1 x User Manual Note: Please allow for differences approximately ± 50 ppm. Different CO2 instruments use different NDIR sensors, so the test results may vary. Thank you for your understanding. Package List 1 x CO2 Detector 1 x USB Cable 1 x User Manual