Transmitter/receiver package eliminates the need to run wires from the front of your room to rear surround speakers. Proprietary wireless transmission technology produces rear speaker audio equivalent to a Bose® wired home entertainment system—with no wires running under floors or through walls. Compatible with all Lifestyle® systems and 5.1-channel Acoustimass® systems. * Wireless transmission technology delivers the audio equivalent of a Bose wired 5.1-channel home entertainment system * Simplified installation and greater placement flexibility for rear speakers * Compatible with all Lifestyle® systems—even older CD-based models—and all 5.1-channel Acoustimass home entertainment systems UPC: 017817393904