Feature: 1. This detector can be placed in children\u0027s room, bedroom, office, car and any place you want to place. 2. This detector is suitable for indoor and outdoor air quality, muti-envornmental air quality monitoring for furniture, decorations, cars, and so on. 3. The back of the product has an open hole design, which allows the sensor to fully contact the air, and can also dissipate heat, reducing false alarms caused by excessive temperature or insufficient contact with the outside air. Specification: This air detector is small, easy to carry, can detect the carbon dioxide around anytimes and anywhere. Features: This detector can be placed in children's room, bedroom, office, car and any place you want to place. This detector is suitable for indoor and outdoor air quality, muti-envornmental air quality monitoring for furniture, decorations, cars, and so on. The back of the product has an open hole design, which allows the sensor to fully contact the air, and can also dissipate heat, reducing false alarms caused by excessive temperature or insufficient contact with the outside air. Visual alarm system: There are indicators that change color according to different levels of carbon dioxide concentration, allowing you to have a more intuitive understanding of the detection results. The product is small and easy to carry, and can be taken anywhere you want. Specifications: Material: ABS Standby time: about 72 hours Battery: 1 * lithium battery lithium battery, 2400mAh CO2: 0 ~5000 ppm, resolution 1 ppm Input: 5V Item size: 83 * 83 * 32mm / 3.3 * 3.3 * 1.3in Item weight: 149g / 5.3ounce Package size: 150 * 83 * 46mm / 5.9 * 3.3 * 1.8in Package weight: 272g / 9.6ounce Packing List: 1 * USB Cable 1 * Air Quality Tester 1 * Manual Package List: 1 * USB Cable 1 * Air Quality Tester 1 * Manual