Discontinued Product. Jack Antenna Roof Mounted built in Signal Meter A/M The JACK Rotating Roof Mounted antenna has a built in amplifier and signal meter. This mounts on your roof and stays there at just 220mm above your roof line and lower than most Air Conditioners. It rotates manually from within your RV until the signal meter shows the best alignment. The controls link thru your ceiling (32mm to 114mm thickness) to a ceiling mounted signal meter and manual rotating handle and button lock. The amplifier is powered by a 240v - 12V power supplier that is included with the kit. No reception dead-spot due to rotational limit commonly found with other antennas. Features Wider Reception Range: Less directional than traditional RV antennas to provide broader reception Greatly Improved UHF Reception: Superior reception of UHF signals where many of the new digital TV channels are broadcast, also offers great reception of remaining VHF channels Built-in Amplifier: Enhance weak signals in fringe areas for improved reception. Flush wall mount pole Compact, aerodynamic design Built-in Digital Signal Meter: Point the antenna for maximum reception before scanning for channels Includes 240v - 12V power supply UV stabilised plastic construction Roof foot print and internal signal meter will cover existing WineGard Sensar cutouts 1 year warranty. Specifications Dimensions: 318mm(l) x 220mm(h) x 415mm(d) Weight 1.04kg Maximum Roof Pitch: 3 degrees Roof Thickness: 32mm to 114mm Amplified UHF - 470-860MHz - 25dB gain Amplified VHF - 47-230MHz - 20dB gain 415mm x 318mm x 220mm high (above roof) Weight: 1.1kg