Feature:1. Digital Screen: The CO2 meter has a large digital screen, which can clearly display detection indicators of carbon dioxide, temperature, humidity2. 1000mAh Large Capacity: CO2 moisture meter has a 1000mAh large capacity lithium ion battery, which is safe and durable3. Intelligent Chip: Temperature detector has a highly sensitive intelligent chip, to ensure that the instrument detection more accurate4. Scope of Application: CO2 meter is widely used indoors and outdoors, closet, kitchen, car, home, can effectively avoid gas poisoning5. Small and Compact: The small and compact body does not take up too much use space, which is convenient for storage and useSpecification:Item Type: CO2 MeterMaterial: ABSProduct Sizes: Approx. 5.2 x 8.6 x 2cm / 2.0 x 3.4 x 0.8inUses: Carbon Dioxide DetectorBattery: Lithium Ion Battery 603040 1000mAh (shipped with built in battery)Detection Range: 400 to 5000 ppm (50 ppm)Input Voltage: DC5V 0.5AOperating Voltage: 3.7VPreheating Time: 35SData Refreshing Frequency: 2SWorking Humidity: 0 to 95%RHOperating Temperature: -10 to 50Plug: USBWeight: Approx. 119g/4.2oz .Package List:1 x CO2 Meter1 x USB Cable1 x User ManualNote:Shipped with built in battery