Versatile and quiet, the Hoover C1660-900 Hush bagless commercial vacuum cleaner combines convenience and power in one complete appliance. You can use the C1660-900 upright vacuum at virtually any hour due to its HUSH Mode option. With the HUSH Mode on, the C1660-900 quietly picks up dirt and dust without major disturbances. The C1660-900 uses HEPA filtration to clean the dust away from your home. It clears out 99.97% of particles 0.3 microns or larger, and is the perfect implement for allergy or asthma sufferers. This bagless vacuum cleaner's cleaning path is 15", which is considerably wider than other commercial vacuums. That means you can pick up more dirt in one pass, and it also features non-marking furniture guards in case you bump into your antique lounge chair. Warning: To reduce the risk of fire, electric shock, or injury: • Do not use outdoors or on wet surfaces. • Connect to a suitable extension cord. See “Extension cord instructions”. • Connect to a properly grounded outlet only. See “Grounding Instructions”. • Close supervision is necessary when any appliance is used by or near children. Do not allow vacuum cleaner to be used as a toy or to run unattended at any time. • Keep hair, loose clothing, fingers, feet and all parts of body away from openings, rotating agitator and other moving parts. Do not operate cleaner in bare feet or when wearing open toe shoes or sandals. • Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes. • Do not use to pick up flammable or combustible materials such as gasoline or fine wood standings or use in areas where they may be present. • Avoid picking up hard, sharp objects with the cleaner. They may damage the cleaner. • Always turn off this appliance before connecting or disconnecting hose. • Do not use without dirt cup or filters in place. Empty dirt cup and clean filters frequently when picking up very fine materials such as powder. • Use extra care when cleaning on stairs. • Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, or anything that may reduce air flow. • Do not pull or carry by cord, use cord as a handle, close door on cord or pull cord around sharp edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces. • Always disconnect cord from electrical outlet before servicing the cleaner. • Unplug cleaner when not in use. Turn off all controls before unplugging. • Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord. Never handle plug or appliance with wet hands. • Do not use with damaged cord or plug. If appliance is not working as it should, has been dropped, damaged, left outdoors, or dropped into water, take it to a Hoover Factory Service Center or Authorized Hoover Warranty Service Dealer (Depot). • Use vacuum cleaner only for its intended use as described in the instructions. Use only attachments recommended by The Hoover Company; others may cause hazards. The toll-free number for Hoover Customer Service is (800) 944-9200.