EAS Cassette to MP3 Converter to USB Pen Drive (Tape to MP3 Music Player, KDJ01, Black) Convert old mix tapes and cassette to MP3 through USB flash disk Plug and Play USB device, no drivers and no computer required. With playback function, easily check the recorded file. Audio output enables you to listen on your headphones, or other speaker system. Built-in battery/USB-powered operation, 3.5mm earphone jack (2 x AA batteries not included) Note: the flash drive should be FAT format