Product name:PM2.5 laser sensor Air quality Monitor Material:ABS with TFT LCD screen Color:Black, White Sensor Type:Laser Measure Range:PM2.5+ HCHO+TVOC+ AQI+PM1.0+PM10 Battery Capacity:2200mA Li battery rechargeable HCHO:0.001-1.999Mg M3 TVOC:0.001-9.999Mg M3 Size:100*95*47MM