It supports FLAC, but not Windows Media Player :( So for file formats it will be MP3 or WMA. If you want the album art that you add. Damage from Sony that has not provided a job satisfactory at this level. That is why I put 4 stars instead of 5.
A test suite software Sony: Lyrics (the words of the song s' display); and Karaoke (I do not know what use this function).
Otherwise, forget it for MP4, j 'y'm added 3 films (given the space available ...) but the screen is too small. Note however the full-screen display of movies is possible.
Noise reduction is great, and more power is adjustable; there are also pre environments - registered as bus / train and a function "Silence"; to be quiet in noisy environments.
The can also put photos or s' used as voice recorder, listen to the radio.
Autonomy also is excellent to listen to 30 is really strong, perso 15 to 17/30 by volume is enough with the noise reduction.
In short a complete product that will satisfy the majority of people, I 'm sure, and a good alternative to Apple for people who have a PC. In addition, the finish is pretty.
We would have also liked a helmet "spaguettti" (flat) so that the thread s' not tangle too. Otherwise, the supplied headphones is also on top!