This kit provides greater freedom in setting and a realistic drumming experience. Not only can you perform using the high-quality internal sounds, you can also connect to a computer for use as the optimal VST instrument controller. Box 1: DTX700 drum trigger module. Box 2: DTP903 pad set 1: PCY135 x 2, PCY155, RHH135, KP100, CH-750 x 2, SS-662. Includes all connecting cable. Box 3: DTP904 pad set 2: XP120SD, XP120T, XP100T x 2, CH-755, HS740A. Box 4: RS700 steel tube rack