... or power HM-705Product Description:SpecificationsA.mini mobile SD card speaker B.Digital amplifier C.plug ... battery or power source E.OEM 1.portable SD card speaker,mp3 speakers,computer speakers2.Connect ... mp3,mp4,CD,mobile phone Specifications:*U-disk/SD can broadcast music by plug in straightly, support ... MP3 format music, with FM *U disk/SD + MP3 format + FM *Power Supply : (1) ...