Using the KEF KW1 Wireless Subwoofer Adapter Kit is easy. First, connect the transmitter to your audio system. Then, place the receiver near your KEF subwoofer and connect them. You can put the subwoofer wherever you like, as long as it's within the 98 - foot (30 - meter) line - of - sight range. When using, make sure there are no large obstacles between the transmitter and receiver to ensure a stable connection. For maintenance, keep the kit in a dry and clean place. If you want to use two subwoofers, buy an additional receiver. This way, both subwoofers can receive the same wireless signal from the transmitter.