In tests conducted by the Hammacher Schlemmer Institute, this indoor television antenna proved to be the best for providing clear channel reception with minimal image ghosting. Tested in urban, suburban, and rural environments, the antenna receives UHF, VHF, and local high-definition broadcasts (requires an HD-ready TV to receive HD signals). During tests, it received four more channels with good reception than the nearest model, and experienced little to no ghosting when tested on the 2nd floor of an urban residence. The high-gain antenna has a flip-up UHF receiver disc that tilts 90° and swivels 160°, and two 34" VHF dipoles that retract into the base, providing a small footprint. With adjustable gain (up to 25db). Works best in unobstructed environments. 7 1/2" H x 8 1/2" Diam. (1 1/4 lbs.)