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 calibration 2. 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 detection 3. 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 minutes 4. MULTIPLE USES: 5 in 1 meter can detect carbon dioxide concentration in air, and HCHO, TVOC, Temp, Humi 5. SCRATCH RESISTANT ABS: Air quality meter adopt excellent ABS material, possess impact resistance, scratch resistance, environmentally friendly Specification: Item Type: CO2 Detector Product Material: ABS Product Weight: 106 g / 3.7 oz(approx.) Product Size: Approx. 9 x 3.5 x 7cm / 3.5 x 1.4 x 2.8in Use: To detect carbon dioxide concentration in the air Battery Attribute: 3.7V Lithium Battery, Battery Capacity: 1200mAh Carbon Dioxide Indication: 0 To 799ppm: Blinking green 800 To 1199ppm: Blinking yellow 1200 To 1599ppm: Blinking orange 1600 To 1999ppm: Blinking red Above 1999ppm: Four color flashes. Package List: 1 x Carbon Dioxide Detector1 x USB Plug1 x User Manual