Eighteen inch digital satellite dish and off-air omnidirectional RoadStarTM antenna together - one mount and one install for satellite or local broadcasts. Winegard's combination 18" digital satellite dish and compact omnidirectional VHF/UHF antenna, is great for RV installation. The Winegard RV combination system provides RV reception in all directions continuously without adjustment. This 14 1/2" omnidirectional antenna mounted above the 18" digital dish provides local RV programs while the 18" digital dish provides the satellite channels. Its built-in preamplifier increases strength and clarity of signals. A second coax cable hole through the roof is required.