1Supports ambient temperature display, humidity display and formaldehyde concentration display. 2Support low battery display and ble alarm function, it is more convenient to use. 3Wide application, suitable for home, office, conference room, new home renovation, etc. 4Detecting formaldehyde and air quality, high measurement accuracy and easy operation. 5Made of high quality material, it is not easy to damage, durable and has a long service life.Condition: 100% Item Type: Formaldehyde Monitor Material: ABS Accuracy Parameter Function Range Resolution Accuracy Formaldehyde 0.00~3.00mg/m 0.1mg/m 5% Temperature -10~60 0.1 1 Humidity 20-99%RH 1% 5% General Parameters Overload Protection OL Sampling Method Diffusion Collection Working Temperature and Humidity -10~45/10~75%RH Storage Temperature and Humidity -10~60/10~70%RH Power Supply 3 x 1.5V AA Battery (Not Included) + USB Power Supply Detection Principle Point Chemical Sensor Principle Display Method Large Screen Color LCD Display Product Size Approx. 138 x 95 x 58 mm / 5.4 x 3.7 x 2.3 in 1 x Formaldehyde Monitor (Battery Not Included)1 x English User Manual1 x USB Cable