The EFNOTE PRO Sound Module, for new customers who want to build the kit from the ground up and for EFNOTE 3/3X/5/5X/7/7X users who want to upgrade the sound module. Specifications EFNOTE PRO Sound Module: EFD-PRO User Interface Full Color, Capacitive Touchscreen Display 2x Multi-Function Knob (with Ring LED) 1x Value Knob (with Ring LED) Trigger Interface 3-Zone (7x): Snare, Crash 1/2/3/4(FX), Ride, Hi-Hat 2-Zone (7x): Tom 1/2/3/4/5, Crash 5(Splash), Crash 6(China) 1-Zone (1x): Kick ELISE 2.0 Trigger Sensing Chip Audio / MIDI Interface Bus