This hose is designed to fit most S300 and S400 series canister vacuum that use an electric vacuum hose.
The SES110 hose connects directly to the canister. It connects to the carpet cleaning powerhead by the user manually plugging in the cord from the carpet cleaning powerhead into the outlet on the hose. The cord from the powerhead would be clipped to your vacuum wand.
Examples of canister vacuums that use the SES 110 hose include S334i Ambiente and the S444i White Pearl.
There is a fingertip switch on the handle of this hose that can turn off the roller in the carpet cleaning power head.