Description This 3 in 1 CO2 monitor can detect real-time CO2 concentration, monitor indoor and outdoor humidity, and temperature. CO2 detection range: 400-5000PPM. Temperature detection range: 0-50. Humidity detection range: 0-99%RH. The Air Quality Monitor is small and portable, easy to carry around as a decoration, you can check air quality anywhere and anytime. With Intelligent early warning system, high quality infrared NDIR sensor, multiple interference prevention The CO2 detector has a built-in capacity rechargeable battery, charging takes only 2.5 hours, and standby up to 30hours. You can check the air quality from anywhere, or have the device continuously monitor at a location. With full-color display and LCD screen design, this carbon dioxide detector is super easy to read. Digital display with intelligent backlight, eye protection function, one key operation. Suitable , school, office, travel, indooroutdoor, agricultural planting, production warehouse, and other occasions. Material: ABS colour: black Package Contents: 1 x air quality monitor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.