About This 5 IN 1 AIR QUALITY ANALYSIS: Air quality detector supports accurate measurement of detection(HCHO), (TVOC), (CO2), temperature and humidity levels, thus achieving comprehensive environmental monitoring in one device FAST CALIBRATION: Smart air quality tester adopts advanced calibration technology to ensure performance optimization within 3 seconds, thereby obtaining fast and trusted results in various environments ERGONOMIC AND PORTABLE: The 5 in 1 air quality detector is compact, lightweight, comfortable to hold, and has a convenient strap, which is very suitable for personal and professional use during travel WITH VOICE REMINDER: This portable air detector is equipped with highly sensitive sensors and voice reminder, which can promptly notify users to observe significant changes in air quality levels STRONG ABS MATERIAL: This air quality detector is made of quality ABS material, which is strong, wear proof, not easy to be damaged and has a long service life