1、Accurate Work: Has 0.3um minimum resolution of particle concentration, this formaldehyde detector can better monitor the air quality. 2、Clear Display: Digital display together with back light largely simplifies data viewing and operation even in the dark environment. 3、Smart Testing: Using a general digital particle concentration sensor with wide measuring range of 0~5000 ug/m³, simple and reliable. 4、Broad Utility: Allows for wide application for living rooms, indoors, residential areas, public places, and factories, mines, etc. 5、Easy Carrying: Comes with a compact size and a light weight as well, the simple carrying and storage enable convenient detection. Item Type: Air Quality Monitor Model: 8803 Material: ABS + Rubber Battery: 3 x 1.5V AAA (not included) Application: It can be widely used for air detection of living rooms, indoors, residential areas, public places, and factories, mines. Detection Range: 0~5000ug/m³ Minimum Reading of Particle Concentration: 1ug/m³ Resolution: 1ug/m³ Minimum Resolution of Particle Concentration: 0.3um Response Time: ≤10s 1 x Air Quality Monitor 1 x Power Adapter 1 x User Manual