Antennacraft Hdtv/Uhf 4 Bay Series Antenna With 35 Boom Length & 17 Elements For Deep Fringe Areas 17 Electronic Elements and Channels 14 - 69. Range Up to 60+ Miles UHF (Ch. 14-69). Output Impedance 300 Ohms. Physical Boom Length 35 Maximum Width 20 Vertical Height 36. Turning Radius 10 and Element Diameter .375.