This is a speaker system for the NWA series of Sony Walkman MP3 players although I believe other Sony models are compatible too.
I have four of these systems in my home which I got a few months back when these were unbelievably being offered as freebies with the Walkman MP3 players; at that time the usual price for these systems was well over £150 and most sites still charge that much.
The silver stand pictured in the link acts as the dock for the MP3 player and also acts as a charger. There is also a separate sub-woofer included too (not too large, about eight inches long and three inches high). The system comes with a remote control (for volume, base, treble and surround sound, etc.) and a line-in cable through which you can input another audio source - my son has one in his bedroon through which he plays his iPod.
The sound quality is really astonishingly good for such a small, compact and stylish system and at this much reduced price it's a real bargain at £39.77 which would include the usual super-saver delivery.
Hope this helps someone.