BEAM Direct Connect Plug for Central Vacuum Hose.
This item is used in place of a 6 foot cord (Pigtail). The inlets in your system must have 120v ran to them and accept the two prongs above the hose inlet. (See Pictures)
This item has the 'Fuse' for the hose built into itself, if your Power Nozzle is not turning on, this could mean the fuse in you Direct Connect Plug has gone bad.