8-Button AV control system;8 Freely configurable keypad buttons; 1 Bi-directional RS-232 port; 1 Uni-directional RS-232 or 1 IR port; 3 General Purpose I/O ports; 1 NEB port (Neets Expansion Bus); Add 2 additional devices - choose between Keypad, Level Control or Port Expansion (serial and I/O); 1 front USB port; Color: anthracite;