Features: 1.In terms of ventilation and heat dissipation, the scientific mesh design is adopted, and the heat dissipation is fast and the detection data is accurate. 2.Environmental protection, energy saving, low battery reminder. Rechargeable, built?in battery(included), can last for 10 hours after being fully charged. 3.Wide measuring range. Measurement objects include C02, HCHO, TVOC, temperature and humidity. 4.Air quality monitor is a kind of non?dispersive infrared absorption principle sensor. USB charging. 5.Suitable for new car, new house, old man room, mother and baby room, children room, school, office, hotel and other multiple environmental testing. Specification: ItemType: Air Quality Monitor_x000D_ Material: ABS_x000D_ Usage: Suitable for new car, new house, old man room, mother and baby room, children room, school, office, hotel and other multiple environmental testing_x000D_ Temperature: 0 - 90_x000D_ Measurement Objects: C02, HCHO, TVOC, temperature and humidity_x000D_ Humidity: 0 - 99% RH_x000D_ Operating Voltage: DC 5V_x000D_ Battery Capacity: 3.7V Lithium battery 1200mA (18500 model) (battery included)_x000D_ Air Quality/CategoryCO2 TVOCFormaldehyde_x000D_ Excellent 600PPM 0.6mg/m^3 0.08mg/m^3_x000D_ Well 600 - 1000PPM 0.6 - 1.6mg/m^3 0.08 - 0.12mg/m^3_x000D_ Bad > 1000PPM > 1.6mg/m^3 > 0.12mg/m^3 PackageList: 1 xAirQualityMonitor 1 x USB Cable 1 xManual 1 xLanyard