... the living space, when using-free, quiet home leisurely>Clean And Efficient:removal of harmful micro-organisms, mites, pollen,pet ... to prevent secondary pollution, so that can make indoor and outdoor spacekeep freshand health>Light Use:to insert a vacuum ... Heat meter calibration device RJZDN15 1 3.0 Acceptable Vacuum cleaner performance tester No Information 1 3.0 Acceptable Production Flow: 1 ...