Battery Powered Wireless Speakers

[Kelemvor]

I'm researching to put together some information we can use at work. We are in need of some sort of speaker system that will have wireless speakers that do not have to be plugged in to anything. They would obviously then have to be battery powered.

The Base unit would have to be plugged in but the speakers would be battery powered.

I've foudn this unit:
http://www.sonystyle.com/is-bin/INTERSH...Information-Start?ProductSKU=SRSRF90RK

Co-worker's parents have one and said it works pretty well. Does anyone know of any other wireless speaker system like this?

Thanks.

 

[Kelemvor]

So I guess the Sony ones are the only option eh? heh.