Comet CA-2X4SR Mobile VHF/UHF Vertical Antennas assist search and rescue volunteers. Comet designed these broadband antennas for those needing voice communications on the ham radio, land mobile, and FRS frequency ranges. CA-2X4SR mobile VHF/UHF antennas offer remarkable coverage area and gain, plus they allow for TX and RX capability in both bands! The amateur radio community works together with local search and rescue and other public service agencies in emergencies