Walmeck 9 in 1 BT Air Quality Monitor CO2 Meter Carbon Dioxide Detector TimeDate CO2 TVOC HCHO PM2.5 PM1.0 PM10 Humidity Detection Support APP Control with Alarm Function for Home Office Car

9 in 1: Multifunctional air quality detector real-time displays time and date and monitors CO2 concentration, HCHO value, TVOC value, PM2.5PM1.0PM10 value, and relative humidity in the air. Clear Display: Large digital screen with backlight, clear and easy to read, support alarm function. Multiple display modes are available, you can switch according to your needs. High Accuracy: Using air semiconductor and infrared sensor, plus high-performance chip, detection is more accurate, higher