Professional drum machine with 12 velocity sensitive pads (w/Dynamic ArticulationTM);50 Preset / 50 User drum kits with 233 sounds assignable to any pad;Exclusive Alesis Dynamic ArticulationTM feature enables a drum sound to change its tonal content as it's played harder for truly realistic performances;Sound stacking, step editing, stereo samples with reverb and ambience;2 Footswitch Jacks, MIDI I/O, Stereo main and aux outs, headphone jack, power supply included;Professional drum machine with 12 velocity sensitive pads (with Dynamic Articulation(TM));Exclusive Alesis Dynamic Articulation feature enables a drum sound to change its tonal content as it's played harder for truly realistic performances;Sound stacking, step editing, stereo samples with reverb and ambiance;2 Footswitch Jacks, MIDI I/O, Stereo main and aux outs, headphone jack, power supply included