Features: The style is upgraded, with heat dissipation hole, which can better measure the gas and the heat dissipation function of the machine. 2.8 inch LCD, backlight display, clear and soft display, clear reading, no need to calibrate after power on, automatic work detection. Using infrared technology, high measurement accuracy, fast response, fast test indoor carbon dioxide level, in order to protect your health. At the same time, it provides real-time monitoring of indoor temperature and humidity. 4-color LED indicator as air quality warning. Different color indicator lights will flash according to the carbon dioxide content, making the air quality more intuitive. The resolution is up to 1ppm, which can accurately detect carbon dioxide in the air, and the measurement range can reach 400-5000ppm. It can be used in office, family, car, school, hotel, greenhouse vegetable, production warehouse, raw material processing and other occasions. Specifications: Display Mode: LED digital display + LCD Screen + backlight Item Color: Black,white (optional) Material: ABS CO2 Detection Technology: Infrared Temperature Measurement Range: 0-50°C Temperature Measurement Accuracy: ±1°C Humidity Measurement Range: 0%-99%RH Humidity Measurement Accuracy: ±2%RH Battery Capacity: 1200mAh Lithium battery Charging Port: 5V Type-C Port Product Size: 9.0 * 7.0 *3.5cm Product Weight: 129g Package Size: 14.0 * 12.5 * 3.7cm Package Weight: 191g Packing list: 1 * Carbon Dioxide Detector 1 * USB Cable 1 * English User Manual