This is a tiny music broadcaster (WMA, MP3 and AAC MP3) of good quality. Great design and extremely lightweight (less than 35 g), it is ideal for athletes. As usual Sony stands out for fast charging of its players (via USB): about 90 minutes of battery life for 3 minutes on the field or 12h of music from 1:30 to full charge. It is available in black, white, purple, green.