Expanding upon one of the most popular products in Korg's history, the MicroKORG XL is an extremely versatile 37-key digital synthesizer. The XL's interface is sleek and straightforward and with just three knobs; it can also be connected to your computer via USB cable if you want to tweak parameters with the sound editor software. The XL also comes complete with a vocoder function that supports sixteen filter bands. The XL can be powered via its original power supply (included) or six AA batteries. This unit is in good condition but does not come with a vocoder microphone.