Air Quality Tester, Temperature and Humidity Accuracy for Tvoc Hcho Black Description: It adopts advanced electrochemical detection module, with high accuracy, stable performance, can accurately detect, CO2 and value. Strong anti-interference ability, low consumption and long service life. It does not require calibration, it can be tested after commissioning and can accurately detect air. Different colors corresponding to different air quality. Hundreds of ventilation openings on the back of the housing not only accelerate convection between air and machine, thus realizing effective detection, but also provide an excellent heat dissipation effect. Wide application: planting in agriculture, greenhouse vegetables, production warehouse, material processing, etc. Specification: Material: Charging time: 2-3h Working time: 6-7h Temperature measurement range: -10 do 5 degrees Size Chart: 92 x 72 x 37 mm / 3.62 x 2.83 x 1.46 inch The package includes: 1 piece of air quality 1 piece instruction 1 piece USB cable