2box Drum It Five Electronic Drum Brain - 10x dual-function trigger inputs, 100x fully editable drum kits, 15x independent trigger channels (maximum), 2x audio line inputs, 6x audio line outputs plus headphones (8x total), USB connection (full-speed), MIDI in/out, LCD display, 10x channel buttons, 8x system buttons, 3x rotary dials, 1x volume knob.