The BROADBAND VHF/UHF Dual Band Antenna CA-2x4SRNMO is an antenna designed for those needing communications on the ham radio, land mobile, Marine and GMRS frequency ranges. The coverage area and gain provided by the DualBand CA-2x4SRNMO is remarkable. Antenna has a spring loaded fold-over hinge, built into the base section of the antenna. You can simply lift the element up out of the socket , and lay the antenna whip down in order to enter garages, parking structures etc...The hinge rotates 360 deg inside the socket so it will fold in the direction needed. Requires an Optional NMO Mount / Cable for installation.