The product's sound quality is a measure of the price, the product drive a permanent hiss which I got used quickly. I have not tested against by the headphones provides since I already owned a pair more adapt to noisy environment in which I work.
The battery hold about 3 hours which is pretty decent for a camera of this weight, I bought a small external battery can charge in court the day without having to plug the mains and it works very well.
I equip an 8GB card and I regret the lack of screen involves having to spend all the songs one by one when looking for a particular artist I rather recommend to equip several small cards (1 or 2GB) avoided having to support several hundred times in a row of buttons. Be careful when loading the map, the player plays the files in the order they have been copied to the card.
Reliability is absolutely deplorable when with it, my first copy held a fortnight, carefree taken by the seller. The second copy was given him almost a month of intensive use. The third never have walked. I imagine that the fourth will not do much better than the other three on this point.
There must also be a card reader to connect it to the computer, the player not exceeding 700 bytes / s (that's not a typo, I speak of bytes / s and no KB / s) complete an 8GB SD card would take about 132 days.
