very good, one thing you should improve is the shadow: if you look carefully near the plug, the shadow appears like a black outer glow, i mean theres shadows on all sides of the plug. fix that, and its goin to be almost perfect to me.
The wire makes the first impression, it's double, I don't know how you did it . The player itself loks good, the textures on it are quite realistic . Howewer i'd replace the 'floor'. Maybe some photo, or hi-res testure with bumps?
Looks great dude... There is something about the lighting that disturbs me though.. and I can't put a finger on it... There also appears to be a few errors on the MP3 player itself.. perhaps some other render settings are in order? Great work though homie.. the modeling is awesome... and the wire is spot on.