Product Specifications: Display : 4.3 inch LCD screen display, 480X270 pixels Atmospheric pressure: 86Kpa - 106Kpa Detection for CO2: Infrared ( NDIR ) Detection for PM: laser-Scattering Material: plastic Color: as shown Sampling time: 1.5 seconds Product Size: 145 x 78 x 97.2mm Detection temperature: -10C to 50C; Relative humidity: 20% - 85% Storage temperature: -10C to 60C; Concentration unit for CO2: PPM Concentration unit for PM: /m3 Concentration unit for HCHO and TVOC: mg/m3 5V DC power charging via -USB port Product weight: 235g Detection data range: (0-500) PM2.5 (0-999 /M3;) CO2 ( 0-5000 ppm) HCHO(0.001-1.999Mg/M3;) TVOC(0.001-9.999Mg/M3;) Package Contents: 1 x Air Quality Detector 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.