Highlights support TF card up to 16GB, built-in Hi0Fi loudspeaker, mount on bicycles ot enjoy music while riding, upto 22 hours of playing time with loudspeaker and 70 hours with earphone Main Features Audio Format MP3, WMA Memory Built-in Memory   no built-in memory, supports TF card upto 16GB Battery & Power Battery built-in rechargeable lithium battery Additional Features Screen no display screen Headphone Jack 3.5mm plug Data Interface USB interface Others built-in loudspeaker, operation buttons Product Details (without package) Dimension 88*35*35mm Weight approx. 132g