3in1 Air Quality Tester CO Temperature Humidity Detector NDIR Sensor Auto Brightness Adjustable Digital TFT LCD Display with Carbon Monoxide Calibration Temperature Unit Switching Functions This portable air quality tester adopts a stable performance and high detection accuracy sensor, supporting real time monitoring of CO concentration, temperature, and relative humidity in the air. Digital TFT LCD display, with brightness automatic adjustable function, so you can see the readings at a glance.  Equipped with air quality level classification function, Type C interface detection, touching buttons, and other functions to meet your usage needs. There are multiple custom setting options, including screen off time, CO calibration, temperature unit switching, sound and vibrating switch, etc., which make your usage experience more personalized and convenient. 3D porous housing with multiple ventilation holes designed for real time air circulation convection. The sensor and theair are fully contacted, highly sensitive, and accurate in the detection of small particle content. It can be widely used in a variety of occasions. Specifications: Name: Air Quality Tester Material: plastics Color: orange Battery: 1 * built in 900mAh battery (included) Power supply: 5V, 2A Type C interface Intelligent alarm: Green: 0-24 PPM, no react. Yellow: 25-49 PPM, it vibrates and rattles continuously 3 times every minute. Orange: 50-99 PPM, it vibrates and rattles continuously 5 times every 1 minute. Red: 100 PPM or more, continuous vibrating and rattling. CO detection ranges: 0-999ppm CO detection accuracy: ±(10+5%*of reading)PPM Temperature detection ranges: 0-50℃ Temperature detection accuracy: ±1℃ Humility detection ranges: 0-99%RH Humility detection accuracy: ±5%RH Item size: 50 * 85 * 17mm / 1.97 * 3.35 * 0.67in Item weight: 54g / 1.90ounce Package size: 135 * 96 * 31mm / 5.31 * 3.78 * 1.22in Package weight: 130g / 4.59ounce