Not the first time we’ve seen one of these, but this one is certainly the smallest at just 7 x 5 x 2cm. The system comprises of two units (transmitter and receiver), wiht one plugged into the audio source (anything from an iPod to a computer), with the receiver at the other end (your large stereo for example). Once connected, you can send any audio source from the transmitter to the receiver, which includes digital files and online radio. And if you plug in via USB, they charge as they work too.
Maximum distance is 50m, both audio and USB cables are included and the whole thing retails for £49.95.