... Amplifier, Portable Digital Speaker -Playtime:10-12Hrs -with FM radio,support U disk and TF card 2012 Presell !! Multifunction Amplifier, Portable Digital Speaker ... -Playtime:10-12Hrs-with FM radio,support U disk and TF card ... Our Multifunction amplifier was well-built with FM radio, support U disk,TF card,mp3 player, microphone ...