Specifications mini vibration speaker 1.AC adapter (Option) 2.FM Stereo Radio 3.Portable Audio System designed Features:mini vibration speaker speaker with 3.5mm audio cable in, enabling great convenience and portability, no extra audio cable just pulls the Built-in audio cable out from the Hamburger pro bottom, then plug to your divice.Suitable for MP3 ,MP4 player, PC & MOBILE PHONE,MD,CD,PDA, ...