Features 1、Precise and Sensitive: Equipped with high precise sensor, real time detection of CO2 concentration in 0 seconds, more accurate. 2、High Definition Screen: Adopt ultra high definition color screen, more intuitive and convenient for users to read. 3、Security Alarm: If exceeds the standard, the meter will display yellow, emit didi sound to give a cycle alarm every 10 minutes. 4、High Performance: The gauge is not easy to be poisoned and aged by harmful gases, with quick response, good stability and high signal to noise ratio. 5、Scope of Application: The detector is suitable for factories, laboratories, families, offices, schools, hospitals, hotels, restaurants and other indoor places. Specification Item Type: CO2 Detector Material: ABS Charging Voltage: 5V Battery Information: 1000mAh polymer lithium (built in) Charging Mode: T C charging Measuring Range: 400-5000ppm Measuring Object: Air Preheating Time: 35s Operating Humidity: 0-95% Working Temperature: -10℃ to +50℃ Accuracy: ±5% Data Refreshing Rate: 2S Measurement Item: Carbon dioxide, indoor temperature and humidity Detection Technology: NDIR infrared sensor Package List 1 x CO2 Detector 1 x Charging Cable (Random Color) 1 x Manual