MPD Digital LMR-400-uhf-1 LMR-400 PL259 Coax Ham or CB Radio Jumper Antenna Coaxial Cable Jumper This is Genuine US Made LMR400 LMR-400 - a Registered Trademark of MPD Digital Systems PL-259 UHF coax cable connectors - Connects Antennas, Receivers, Meters and Radio transmitters USA Made LMR-400 Transmission Line Coaxial Cable with Soldered Silver Plated Connectors Teflon Dielectrics Assembled by MPD Digital - a DoD Supplier - in our GA Facility using MILSPEC Components Impedance 50 Ohms Frequency Range DC ~ 11 GHz - PL-259 Connectors are not recommended for use above 300Mhz (See N Male options)