Turn any Niles Compact Subwoofer into a wireless solution for applications in where running wire is not an acceptable option. With a wireless range of approximately 48 feet, the wireless transmitter and receivers are compatible with the Niles SW6.5 and SW8 powered subwoofers. One SW-T transmitter can be used with up to four SW-R receivers simultaneously. Transmitter connects to the line-level or LFE outputs on a receiver or preamp.