This quality monitor can detect real-time accurate detect of Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compounds(TVOC), PM2.5, PM10 and . CO2 detection range: 370-9999PPM. PM2.5&PM10 detection range: 0-1000ug/m3. HCHO detection range: 0-1.000mg/m. TVOC detection range: 0-2.000mg/m. detection range: 0-500ug/m3.Using -grade optical transmission induction sensors, it can accurately identify various indicators of the , and contains various numerical algorithms to achieve intelligent measurement and standard flow. The quality detector has a built-in capacity 2200mAh rechargeable battery, standby up to 9hours. You can check the quality from anywhere, or have the device continuously monitor at a specific location.With 3.2 inch High-definition LCD screen digital display design, this quality monitor is super easy to read and shows clearly real time data, with backlight display, it can easy to use in dark environments. Adopting with high precision chip, 1 second update and response after starting up. Our quality detector is designed to be used simply requires no calibration.Once turn on the quality meter, it will automatically measure the surrounding quality for you. Our device was specially designed to be operated by anyone, anywhere, so you can keep your space safe without a tech-induced headache. You can open/close and switch screen information with one-key operation. NOTE: Press MODE button to switch HCHO or TVOC mode.This quality monitor is suitable for home detection, car detection, maternal and child room detection, and public place detection, perfect for various industrial measurement scenarios, including electric , metallurgy, laboratory, dust removal, bioengineering, etc.Colour:blackMaterial:ABSPackage Contents:1 set x radon detector for homeOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.