49 full-sized keys with velocity and channel aftertouch 4 parts + vocoder with mic Input 320 programs and over 500 preset tones for keytarists 79 types of part multi-effects and part EQ, 79 types of program multi-effects, chorus, reverb, master compressor, and master EQ Tone Remain function switches sounds seamlessly without unnatural sound cutoff Ribbon controller, modulation bar, and assignable controls for expressive performance Up to 4 hours of battery-powered* operation; can also be powered via AC adaptor*Rechargeable Ni-MH batteries only. Bluetooth MIDI and editor app for wireless sound customization Weighs just 9 lb. 5 oz./4.2 kg (without batteries) Available in black and white models with removable Edge Blade for custom look One extra Edge Blade included to complement your AX-Edge model Audio file playback via external USB memory Master MIDI controller functionality for remote operation of sound modules, plug-ins, and more Dual display system optimized for live performance Optional ST-AX2 stand provides stable support when the instrument is not in use