Specifications A.mini mobile SD card speaker B.Digital amplifier C.plug it ... or power HM-705Product Description:SpecificationsA.mini mobile SD card speaker B.Digital amplifier C.plug it can ... .battery or power source E.OEM 1.portable SD card speaker,mp3 speakers,computer speakers2.Connect to your ... , mp3,mp4,CD,mobile phone Specifications:*U-disk/SD can broadcast music by plug in straightly, support ...