Yamaha DD55C 7-Pad General MIDI Digital Drum System Digital drum system with 7 touch-sensitive drum pads 174 stereo-sampled percussion voices assignable to any of the pads 2 assignable foot pedals; 100 built-in rhythm styles 50 programmed drum kits and 1 user-programmable drum kit Pair of 5-watt stereo speakers; 22.3 x 6.9 x 14.2 inches (W x H x D)