The formaldehyde detector can effectively detect the concentration of formaldehyde and TVOC in your living environment, such as newly renovated houses, rented houses, offices, cars, etc. It is also a temperature and humidity monitor, bringing more convenience to your family. Using semiconductor gas sensor and air convection detection principle, it can quickly and accurately detect harmful gases in your home. Multifunctional air quality tester and temperature and humidity tester: display formaldehyde (HCHO) and TVOC concentration, air quality index, air quality grade, temperature and humidity. 2.8-inch large LCD screen with backlight, which can be read clearly even in dark environments. The foldable stand can be placed on the desktop to save space when not in use. Built-in rechargeable battery, fast charging via Type-C USB cable. Portable and lightweight, easy to carry.