buttons, and large back-lit LCD for user-friendly operation. 4 metronome sounds (including human voice). Reference tone function (makes it easy to verify tuning by ear). Practice with the 'Rhythm Coach' by connecting a V-Pad (optional), plus headphone monitoring, foot switch control for hands-free play/stop, rotary dial, dozens of built-in play-along drum patterns. Dedicated sliders, rubber pads and acoustic drums can also be detected via built-in mic. Direct connection with guitar and bass, and MIDI input for syncing to external sequencers.