Feature: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 DetectorMaterial: ABSCharging Voltage: 5VBattery Information: 1000mAh polymer lithium (built in)Charging Mode: T C chargingMeasuring Range: 400-5000ppmMeasuring Object: AirPreheating Time: 35sOperating Humidity: 0-95%Working Temperature: -10 to +50Accuracy: 5%Data Refreshing Rate: 2SMeasurement Item: Carbon dioxide, indoor temperature and humidityDetection Technology: NDIR infrared sensor.Package List:1 x CO2 Detector1 x Charging Cable (Random Color)1 x Manual