USB keyboard support storage disk (SD, TF, Flash disk), support computer, Mobile phone MP3, MP4 etc Spec:(Dia)76*435mm MF-01 keyboard with ... speaker is used for USB keyboard ,support storage disk(SD,TF, Flashdisk),support ... .5W, 4 ohm), output power: RNS 4W (2W + 2W). Power input: USB power supply (if you use other power supplies, it should ...