MPOSTOP(TM) TF Card USB Portable Cassette to MP3 Converter Tape-to-MP3 Player Through TF Card Micro SD Card Music Player with Headphones Convert old mix tapes and cassette to MP3 through a TF card (Micro SD card). 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). Convert all of the music on tape to your TF card in MP3 format automatically.