The 75 ohm Sensar RV-3095 antenna has built-in amplifier and unique circuitry that gives you clear VHF/UHF reception whenever you park your RV. Raise, lower and rotate the Sensar III antenna from inside your parked RV. It's easy to install and extends only four inches above the roof while traveling. The antenna can be elevated to 40" above the roof line, and is bidirectional - it must be pointed toward the TV station you want to watch. It must be used while the vehicle is parked. The Sensar antenna is made of tough UV protected Centrex® polymer and other materials that are corrosion resistant.
When combined with digital off-air tuner and HD television, Sensar III head is capable of receiving local channels in razor sharp High Definition.