1. Build-in memory ranged from 128MB to 1GB 2. Play/pause/stop play music 3. Skip next/skip previous track 4. Volume +/- adjust. 5. Rechargeable dry battery 6. USB2.0 High Speed Data Transfer Order details: 1)Delivered worldwide 2)No minimum order restriction 3)24 Month Warranty Accessories: Earphone; USB cable; Software CD; User manual; AAA battery, box