Newly upgraded 10-in-1 air detector with 24-hour battery life PM25 formaldehyde TVOC temperature and humidity CO2 detector Peculiarity: The MT13 Air Quality Tester is an all-in-one environmental monitoring device that can detect and display 10 key indicators in real-time, including AQI, CO2, CO, formaldehyde, TVOC, PM particulate matter, temperature and humidity. It is equipped with a 2.8-inch TFT display, built-in 2000mAh lithium battery, which can work for about 24 hours when fully charged, and is charged with 5V/1A Type-C, which is convenient for charging and has a long battery life. The new UI interface and two-stage alarm design, two air health level indicators, orange and red two-stage alarm prompts make it easier and more direct to detect air problems. The device has a self-calibration function to ensure accurate data, as well as practical functions such as manual key calibration, autonomous switching of alarm sounds, switching temperature units, and screen off monitoring. Whether it's a home, office, or other indoor environment, this tester helps users understand air quality in real time to protect the health and safety of the living environment. Specification: Product Name: 10-in-1 Air Quality Detector. Product material: ABS body TFT electroplating mirror screen (upgraded version). Color: White, Black Detection parameters: CO2 (carbon dioxide), CO (carbon monoxide), HCHO (formaldehyde), TVOC (sum of volatile organic compounds), PM0.3, PM2.5, PM10, temperature and humidity detection, AQI (air quality index - mainly comprehensive particulate matter), a total of 10 environmental parameters. Key function: press and hold the button = power on and off (the carbon dioxide value will display a 60-second countdown when the power is turned on), click = switch the temperature unit, double click = switch alarm sound, quick three clicks = calibration (the carbon dioxide value will display a 60-second countdown when calibrating is the same as when the machine is turned on), and four quick clicks = screen off monitoring (click to wake up the screen). Device power supply: 2000mAh lithium battery, DC5V/1A Type-C charging, fully charged and ready to work for about 24 hours. Product weight: about 70 * 35 * 90mm, 145g. Weight of packing ruler: about 145*100*48mm, 200g. Package includes: 1 x Air Quality Detector. 1 x Type-C cable. 1 x User Manual. Note: If you find that the temperature is not accurate after you get the device, don't worry: the temperature of some devices after turning on may cause some deviations due to the temperature test during the production process, so we have also set the manual calibration temperature: press the button 7 times, and you will enter the manual calibration page of the temperature. Once you are on the page, click on the button as " and double-click as "-". It is recommended not to calibrate during charging. The device has a temperature compensation plan while charging and may be affected. _x000D_