Highlights support SD/SDHC card, USB drives, card shape, built-in loudspeaker Main Features Audio Format MP3, WMA Memory Built-in Memory   no built-in memory, supports SD/SDHC card upto 16GB Battery & Power Battery no battery needed, support DC5-5.V 90-440mA  input   Additional Features Screen no display screen Headphone Jack 3.5mm gold plated plug Data Interface USB interface Others built-in loudspeaker, switch, EQ, volume down/up and play/pause buttons, card shape with a little girl with angel wings image Product Details (without package) Dimension 90.7*59.2*20.5mm Weight approx. 110g