Features: Experience precise air quality monitoring with the co2 meter, featuring a 3 in 1 designs that measures carbon dioxide levels, temperature, and humidity simultaneously. This compact device boasts a colorful backlit display that visually indicates co2 concentration changes, powered by a built in 1200mah lithium battery rechargeable by USB. For health conscious individuals and families who prioritize maintaining optimal indoor air quality in their homes or offices. Perfect for use in various settings such as kitchens, living rooms, bedrooms, or even on the go, ensuring you are always aware of your environment's air quality. With its user friendly interface, simply hold the "on off" button for three seconds to activate automatic co2 detection, making it an essential tool for any modern household. Specifications: Component:ABS Size: Approx.90x70x35mm/3.54x2.76x1.38inch Color:Black/White Built-in lithium battery: 1200mAh Voltage: 3.7V Measuring range: 400-5000PPM Charge for 2-3 hours, and it can last for 240-360 minutes. Measurement accuracy: 10PPM Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings. Package includes: 1pcs Digital CO2 Meter 1pcs Instructions 1pcs Data Line