Bang & Olufsen has developed the BeoLink Wireless 1 System, using a wireless signal to send high-quality music all over the house. Each transmitter/receiver communicates with the others via 2.4GHz wireless technology, with the transmitters capable of sending and receiving signals 90 feet away.
A single transmitter can handle seven pairs of loudspeakers. In each room, a remote infrared (IR) device sends the signal to the speakers. Of course, all of these units are elegantly designed in that inimitable Bang & Olufsen way.