... : USB keyboard ,support storage disk(SD,TF, Flashdisk),support computer, Mobile phone MP3,MP4 etc Rotatable Folded Keyboard Speaker Operation ... control volume and so on.• Connect to computer USB port with supplied cable.• Connect to computer, mobile phone, MP3, MP4 and other ... player and speaker.Keyboard can be used by connecting to computer without driver, which could realize the function of plug & ...