... bacteria, stink,weat, etc;3,real-time display air pollution index air pollution index:0-250 0-80(green light) ... users open the window to take a breath or leave the room VOC(volatile organic compound): 0-90 0 ... users open the window to take a breath or leave the room harmful gas: 0-99 0-30(green ... users open the window to take a breath or leave the room Our air tester bacteria, dust, stink, sweat, etc. ...