Korg X50 61-Key Music Synthesizer Keyboard 61 velocity-sensing synth action keys; Pitch Bend & Mod Wheels Dual Poly arpeggiators and on-board multi-effects provide performance enhancement 512 single Programs; 384 eight-part Combis; 128 sixteen-part Multis (16 preloaded) Stereo outs, individual outs, dedicated USB/MIDI port, MIDI In/Out for added flexibility Remarkably lightweight and compact - integrated metal handles add strength