Air Quality Monitor, Rechargeable Carbon Dioxide Meter with 1200mAh Battery Electric Digital CO2 Detector Temperature Humidity Air Pollution Analyzer for Home Office Car [Rechargeable Battery] This CO2 detector has a built-in 1200mAh rechargeable battery which can last for many hours. It can be charged by the USB cable we provide, and you can check the air quality from anywhere. [Easy To Use Carry] No calibration required, turn on the air quality monitor and it will detect the CO2 automatically. The palm-sized about 90 x 70 x 35mm/3.54 x 2.8 x 1.4 inch makes the CO2 detector easy to carry. [Large LCD Display] This carbon dioxide detector with large LCD color display, which is clear and easy to read. The colored ring will change according to the CO2 content. Using professional optical principles to accurately and quickly detect CO2. [Wide Application] The air quality monitor is widely used for agricultural planting, greenhouse vegetables, production warehouse, raw material processing, home interior, office, car, school, hotel, campground and other environments. [Multifunctional] The air quality monitor can detect the carbon dioxide, temperature, humidity, at the same time. It can quickly measuring and obtaining a relatively stable measurement value. Colour: White Delivery quantity: 1pcs