Roland Gaia SH-01 37-key synthesizer, featuring three virtual analog engines onboard, each with a dedicated oscillator, filter, amplifier, envelope, and LFO. The Gaia has a 64-voice polyphony, and features many built-in effects for endless sound design possibilities. It is capable of five simultaneous effects, including distortion, flanger, delay, reverb, low boost, D-Beam, arpeggiator, and Phrase Recorder onboard. This light-weight keyboard runs on AC or battery power for portable convenience. The back panel contains USB ports for saving user patches to USB flash drives, and for audio/MIDI connection to computers. It also has the standard MIDI DIN connections for connecting additional hardware units. The keyboard is in great condition. All of the knobs and faders are in great shape, as well as the key bed. Don't miss out on this Roland classic!