Package Included: 1 * Air quality detector 1 * Cable 1 * User Manual Specifications: Type: A(5-IN-1), B(3-IN-1) Screen size: 2.8 inches Screen type: TFT-LCD Screen material: glass Material: ABS Color: black, white Screen resolution: 240 * 240 Response time: <1s Size: 71.2*91.6*36.5mm Test temperature range: -10 to 70 Humidity test range: 0-99%RH power supply Working voltage: 5V/1A adapter charging Maximum power: charging current 600mA 3.7V lithium battery power supply Battery capacity: 1200mAh Battery type: lithium battery Charging method: USB Charging time: 1 hour Features: - Carbon dioxide detector: Smart carbon dioxide value tester gas analyzer uses air semiconductor TVOC sensor to monitor temperature and humidity of air quality. - It is a high-quality air quality detector, using a good-quality electrochemical detection module, with good accuracy, stable performance, strong anti-interference ability, low consumption and long service life. Accurately detect carbon dioxide. The large screen displays power, CO2, temperature and humidity. - Adopt electrochemical detection module of high quality, with good accuracy, stable performance, strong anti-interference ability, low consumption and long life of the cabinet. - The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide. -The large screen displays the power, CO2 value, temperature and humidity. - Equipped with a large screen, different font colors display different air quality, green 400-450ppm, blue 451-700ppm,Purple 701-1000ppm, yellow 1001-2000ppm, red 2001-5000ppm. - Hundreds of ventilation holes at the rear not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a good heat dissipation effect.