Griffin Technology iMic USB External Sound Card USB audio adapter for connecting microphones, phonographs, cassette decks, and other sources to your computer Records voices or instruments or converts LPs and cassettes to MP3s and CDs 1/8-inch input jack offers both mic and line-level signals 1/8-inch output jack connects to headphones or speakers for playback Easy to set up and use; compatible with USB-equipped Macs and PCs