The "Eze Eye" is designed so the coax cable can run directly from the antenna or satellite dish, through the "Eze Eye" and to the television or satellite receiver without any other connections required.
It seals against the side of the van to prevent water seeping in aroud the edge.
The "Eze Eye" fits the standard caravan wall (28-35mm) and requires a 22mm hole to be drilled through the caravan wall, once fitted it has caps to cover the holes keeping the dust and water out when not in use.