Ham/CB Radio Coax 3ft Jumper Genuine LMR-400 Times Microwave Coaxial Cable Antenna Equipment Extension PL-259 Connector PL259 LMR400 LMR-400 is a Registered Trademark of Times Microwave Systems PL-259 UHF coax cable connectors - Connects Antennas, Receivers, Meters and Radio transmitters 3ft feet of coaxial cable USA Made LMR-400 jumper with Soldered Silver Plated Connectors Teflon Dielectrics Assembled by MPD Digital - a DoD Supplier - in our GA Facility using MILSPEC Componants Impedance 50 Ohms Frequency Range DC ~ 11 GHz - PL-259 Connectors are not recomended for use above 300Mhz (See N Male options)