MP3 player,Metal case, super slim; 7 Kinds of EQ, Low power consumption design Most popular model 1) popular design2) Metal case, super slim; 7 Kinds of EQ 3) Support MP3/WMA audio formats4) Digital record function5) Low power consumption design, more than 8hrs playback 7) USB 2.0 , bulit-in lithium battery8) Multi-language supported9) Color: Black/Blue/Green/Red/Gold/Silver