Feature: 1. Digital Screen: The CO2 meter has a large digital screen, which can clearly display detection indicators of carbon dioxide, temperature, humidity 2. 1000mAh Large Capacity: CO2 moisture meter has a 1000mAh large capacity lithium ion battery, which is safe and durable 3. Intelligent Chip: Temperature detector has a highly sensitive intelligent chip, to ensure that the instrument detection more accurate 4. Scope of Application: CO2 meter is widely used indoors and outdoors, closet, kitchen, car, home, can effectively avoid gas poisoning 5. Small and Compact: The small and compact body does not take up too much use space, which is convenient for storage and use Specification: Item Type: CO2 Meter Material: ABS Product Sizes: Approx. 5.2 x 8.6 x 2cm / 2.0 x 3.4 x 0.8in Uses: Carbon Dioxide Detector Battery: Lithium Ion Battery 603040 1000mAh (shipped with built in battery) Detection Range: 400 to 5000 ppm (50 ppm) Input Voltage: DC5V 0.5A Operating Voltage: 3.7V Preheating Time: 35S Data Refreshing Frequency: 2S Working Humidity: 0 to 95%RH Operating Temperature: -10 to 50℃ Plug: USB Weight: Approx. 119g/4.2oz . Package List: 1 x CO2 Meter1 x USB Cable1 x User Manual Note: Shipped with built in battery