Available in most of the computer shopping malls (Wanchai/MK), pretty straight forward in setting up (provided your phone is android base) as it basically mirror the audio playback on your phone via wifi, the beauty of it is (i) cheap; (ii) comes with digital out (via toslink) and (iii) you can still carry your phone around the house while playback (so much more convenient to change songs, etc.)
Of course the sound quality is not comparable to say, a network audio player (with Sportify support) but you are only paying 1/10th.