I bought a similar player last week on ebay.
However it's not a 'Pasen' but seems to be a clone of one.
When it boots up you get a 'Rockchip' splash screen instead of the Pasen splash screen.
All of the functions are the same or similar and the sound quality through decent earphones is excellent.
The user manual is awful and seems to be a generic one rather than for this particular player. Take a look
HERE
By the way if anyone knows where I can get a decent manual, please let me know.