I was visiting for a very short time the MP4 Player - was an Easter present for my nephew. Unfortunately, the part had some errors: switched repeatedly on alone, the battery could not be loaded ..... Had then the company Bertronic contacted by phone and spoke with a friendly lady totally: in a very short time I noticed a new player has been sent, the now works properly. A big fat plus also for the great customer service the company Bertronic. Top!