This kit has a two position on off switch hose which creates a Circuit through the two low voltage electrical contacts in your inlet valve. You will see the wall end has a two metal contact Plates separated by a thin plastic landing. These Plates create the circuit through the switch in the hose handle that permits control of your central vacuum. There is a small tab projecting from the top of the hose end that helps you orient the hose in your inlet. This tab should be located at the top of the inlet valve opening as you insert the hose end. The wave combination nozzle is designed to move from carpets to hard floor without the need to make an adjustment. There is a simple friction connection between the floor nozzles and the end of the telescopic wand to make changing tools easier. The wand ratchets at one inch intervals from 25 to 42 inches so you can adjust to a height comfortable for your use. Many find this an ideal second package to complement their electric brush kit for the portion of the home dominated by hard floor surfaces like the kitchen, family room, den, or basement. An Italian made ratchet chrome telescopic wand with nylon collar and a full set of soft vinyl accessories are ideal for cleaning above the floor. The accessories include a 5 inch natural fill dusting tool, a 13 inch vented crevice tool, and 5 inch upholstery tool with a built in brush strip ideal for stairs and the sofa, a mesh caddy bag collects everything between uses and the mesh allows you to easily see the tool you need through the bag.