Product Description This product is suitable for the detection of formaldehyde content in the air , ensure that you can live in a safe air environment. The following four cases will lead to an increase in formaldehyde in the air: using air conditioning, decoration materials, confined space for a long time and recently renovated room Detector can be placed in the bedroom, living room, car interiors and other places Technical Parameters: Measuring range :0~3mg Power supply :5V Size : 70*21*130mm Safety Standards: environmentally friendly Flow range :5 L/min Accuracy :0.01 Resolution :0.01mg/m³ Weight ?210g