Features: 1¡¢It can accurately detect indoor formaldehyde (HCHO), total volatile organic compounds (TVOC) and air quality index (AQI, 6 levels in total). 2¡¢You can more easily monitor the air quality in your home, car, hotel room, or wherever you live. 3¡¢Using semiconductor air quality sensor technology, diagonally backlit LCD screen. 4¡¢One?button detection, automatic shutdown function, over?range alarm system. 5¡¢Easy to use, you just need to press two AA alkaline batteries to use, which is very practical. Item Type: Formaldehyde Detector Material: ABS Purpose: to detect the methanol content in the air Working Voltage: 2.4~3.2V Detection range: 0.000-3.888mg/m3 (formaldehyde), 0.000-9.999mg/m3 (TVOC) Product Size: Approx. 53x118x21mm / 2.1x4.6x0.8in Color: White Battery Model: L6/AA Battery Type: AA Alkaline Battery (Battery Included) Battery Capacity: 1500mAh Number of Battery: 2 1 x Formaldehyde Detector 2 x Battery