We all know that air is an indispensable part of our lives. The quality of air is affecting our body and mind, but the air is colorless and tasteless, we cant measure it with the eyes. At this time, we need an air tester to help to monitor the air quality. Specifications: Color: black, white (optional) CO2 measuring range: 400-5000ppm Temperature measuring range: 0-50â Humidity measuring range: 0ï¼ -99ï¼ RH Battery: 3.7V, 1200mAh Item size: 90 x 70 x 35mm / 3.5 x 2.8 x 1.4in Item weight: 117g / 4.1ounce Package size: 140 x 125 x 41mm / 5.5 x 4.9 x 1.6in Package weight: 173g / 6.1ounce Packing List: 1 Air Quality Analyzer 1 USB Cable 1 User Manual