Not really sure what I can tell you about this one other than it's a headphone amp that I bought from eBay.
It works really well, has a good, firm volume control, a sexy electric blue power indicator, is of really solid construction - all metal casing - and goes up very loud indeed.
I decided to sell my headphones as I just never really use them indoors. I'm keeping one pair for travelling, but the rest can go so check out my other ads if you're looking for some.
Power pack is included, obviously.
£49 delivered UK.