The QFX Retro 40 is a Bluetooth-enabled cassette tape recorder housed in a vintage shoebox enclosure design. Record to cassette tapes from line level sources CD, radio, etc. or create voice memo recordings using its built-in microphone. Retro 40 brings modern conveniences for wireless music listening. You can also play music files stored on USB drives and even create custom music mix tapes from music stored on and played from the USB music player. Retro 39BT also travels well since it can be powered using either its AC adapter or from four C batteries.