There are 3 assignable zones for control over different samples. The XP120T is fully compatible with the DTX900 module and the Dtxtreme III module when upgraded to the proper firmware. - XP120T 12" Electronic Tom Pad, 3-Zone, Textured Cellular Silicone Yamaha XP120T 12" Electronic Tom Pad Height: 5 Width: 0 Weight: 9.9