This kit includes a 400mW bridge that can be mast mounted, 8.5dBi antenna and pigtail connector. 

The package includes everything you need power adapter , injector and mounting brackets. EOC console cable included

You will need standard cat 5 ethernet cable to go between the bridge and the computer.

The power injector requires 110v power on a boat it can be used with an inverter or shore power.

Any computer with 10/100 ethernet port and web browser will work to configure and use the bridge no drivers required.

You will have to understand how to change your ip address to configure and use the bridge and be able to follow the instrustions below. If have only have basic networking / computer skills the USB kit will be better for you.