Alesis SR16 | Classic 24-bit Stereo Electronic Drum Machine with Dynamic Articulation Professional drum machine with 12 velocity sensitive pads (w/Dynamic Articulation) 50 Preset / 50 User drum kits with 233 sounds assignable to any pad 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 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)) 50 Preset / 50 User drum kits with 233 sounds assignable to any pad 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