LED Screen Air Quality Monitor Wall Mount Digital Temperature CO2 Concentration Detector DM1306 Item Type: Air Quality Monitor Display Method: LED screen display Atmospheric Pressure: 86-106Kpa Sampling Time: 1.5 seconds Detection Temperature: -10-50℃ Temperature Accuracy: ±1.0℃(0-40℃) Temperature Unit: Celsius Storage Temperature: -10-60℃ Detection Humidity: 20%-85% Humidity Accuracy: ±5% CO2 Detection Method: Infrared CO2 Concentration Unit: PPM CO2 Detection Range: 400-5000ppm CO2 Detection Accuracy: 400-1000ppm, Deviation: ±50ppm; Above 1000ppm, Deviation: ±5% Resolution: 1ppm CO2 Alarm Value: 1000ppm Support manual setting of 800-2000ppm CO2 alarm threshold. CO2 alarm on and off function (if the user does not like the alarm, people can turn it off) Battery: 1 x 2000mAh Battery(built in battery) Indicator Light: Green: 400-1000ppm Orange: 1001-2000ppm Yellow: 2001-3000ppm Red: 3001-5000ppm