Integrated sensors capable of accurately detecting carbon dioxide, temperature and humidity in the air. Large screen design, clear and easy to see. CO2 detection ranges from 400 ppm to 5000 ppm with an accuracy of 1 ppm. Easy to use, just press the on / off button for 3 seconds to turn it on. This easy-to-carry air detector can help monitor the air quality in the home. Especially for families with babies, children and pregnant women. Features: Material: ABS and PC Input: DC5V Sensor: infrared detection; TVOC sensor (optional) The color black; white (optional) Detection range: 400-5000 ppm Measurement precision: 1ppm Display: LED digital display + LCD screen + backlight Battery: 3.7 V / 1200 mAh lithium Applicable temperature: 0 50 Packing list: 1 * CO2 meter 1 * USB cable 1 * user manual