Raymarine HS5 SeaTalkhs Network Switch [A80007]

Up to 5 displays or other peripherals can be connected directly to the HS5 network switch. The 5th port also supports Gigabit speed for interconnecting multiple HS5 switches together on very large networks.The compact HS5 works on both 12V and 24V dc power systems, and is simple to install with large keyhole mounting slots and front-facing status indicators.

eBay