Multi-room solution RearStation 4 is capable of wirelessly sending music to any available room in a home. The source can be an AV receiver, an Internet radio, a computer or a portable device (iPod, mobile phone, smart phone). In any case, the transmitter sends a signal received via a stereo RCA cable up to 20 metres around it. The RearStation 4 does not work with the Impaq series or with the subwoofers/receivers of the +R series.
Amplifier built into receiver The RearStation 4 receiver has a built-in amplifier which connects it to any passive speakers you might have. It delivers 2 x 30 watts of RMS output. The volume and mute functions are controlled via a remote control.
Easy expansion 
RearStation 4 expansion sets are available, making it possible to wirelessly transmit sound signals to up to three rooms in your house. The basic RearStation 4 product consists of one sender and one receiver. Each receiver is capable of powering two loudspeakers (stereo). Up to two 'expansion kits' can be purchased to bring sound into additional rooms. In our example you'll see 1 sender and 3 receivers for 3 listening areas: A, B, C.
Wireless rear speakers for home cinema and multimedia surround systems This handy wireless sender-receiver system is capable of more than just transmitting sound into multiple rooms. It's a great way to get around the home cinema dilemma of a cable stretched throughout a room to feed the rear speakers of a surround sound system. RearStation 4 sends this signal wirelessly. Connect the sender to the line-out outputs (rear/side/left/right) of the AV receiver and using a short stereo cinch cable. Then connect the receiver to the rear speakers using a short loudspeaker cable. RearStation 4 is configured for wall-mounting.
For AV receivers with pre-outs Your AV receiver needs a special pre-out connection (see image) to connect with the RearStation 4. These pre-out connections deliver the individual speaker signal as a separate line level.
Electronics 