Description: PORTABLE DESIGN: The 3 in 1 Air Quality Monitor is compact and lightweight, making it easy to move from room or take outside. ACCURATE TESTING:With dual thousand detection, innovative constant temperature detection,  this air analyzer provides accurate and reliable results. MULTIFUNCTIONAL:This monitor not only measures AQI and levels, but also detects volatile gas levels and calculates the Air Quality Index (AQI) for real time air quality assessment. EASY TO USE:Featuring an LED display and intelligent memory calibration, the air tester is easy to use and the results are easy to read. WIDE APPLICATIONS:Air quality pollution monitor suitable for use in homes, offices, greenhouse, airports,  and other indoor space where air quality may be a concern. Specification: Examination Range:0.000-9.999mg/m3()                                  0.000-2.888mg/m3() Size Chart: 15cmx6.8cmx5.5cm/5.91inchx2.68inchx2.17inch Package Includes: 1 Air Quality Monitor 1 USB Cable Note: Press the button for 3 seconds to start the test. No calibration is required.