Feature:1. 1 SECOND UPDATE: The air quality monitor can update the system 1 second in real time, and can directly detect air quality without calibration2. ACCURTAE DETECTION: The high performance analysis chip is used to accurately catch the weak current generated in the electrochemical reaction process of CO2 Detector for more accurate detection3. BATTERY LIFE: The CO2 detector is equipped with 3.7V 1200mAh large capacity lithium battery, and the stand by time is about 240 to 360 minutes4. MULTIPLE USES: 5 in 1 meter can detect carbon dioxide concentration in air, and HCHO, TVOC, Temp, Humi5. SCRATCH RESISTANT ABS: Air quality meter adopt excellent ABS material, possess impact resistance, scratch resistance, environmentally friendlySpecification:Item Type: CO2 DetectorProduct Material: ABSProduct Weight: 106 g or 3.7 oz(approx.)Product Size: Approx. 9 x 3.5 x 7cm or 3.5 x 1.4 x 2.8inUse: To detect carbon dioxide concentration in the airBattery Attribute: 3.7V Lithium Battery, Battery Capacity: 1200mAhCarbon Dioxide Indication: 0 To 799ppm: Blinking green800 To 1199ppm: Blinking yellow1200 To 1599ppm: Blinking orange1600 To 1999ppm: Blinking redAbove 1999ppm: Four color flashes.Package List:1 x Carbon Dioxide Detector1 x USB Plug1 x User Manual