High-gain directional FM radio antenna for receiving signals from distant FM stations. It is designed for use outdoors, inside attics or as a portable antenna on RVs. Features a 3-element design offering a good combination of directional reception and gain (up to 5.5 dB; front-to-back ratio of up to 15 dB). The main element is a 55" wide folded design. Overall boom length is just 46" and the turning radius of the antenna is 40". Connects to your 75 ohm coax (not included). Designed to greatly improves radio reception of distant signals. Ships in a 56" long box. The antenna elements fold out so assembly and installation is very simple. Remember that with directional antennas, the antenna's shortest element is the "front" of the antenna - so point the antenna towards your desired station with the shortest element at the front.