The SL?280 is a master space controller (Kramer Control brain) that can operate over Ethernet with control interfaces that include: eight bidirectional RS?232, eight IR, eight GPI/O, and eight relays. It controls devices such as scalers, video displays, audio amplifiers, Blu?ray players, sensors, screens, shades, door locks, and lights. Multiple Kramer Ethernet control gateways can be used to add remote I/O ports.