This is Genuine LMR400 LMR-400 - a Registered Trademark of Times Microwave Systems * PL-259 UHF coax cable connectors - Connects Antennas, Receivers, Meters and Radio transmitters * 100ft feet of coaxial cable 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 Componants * Impedance 50 Ohms Frequency Range DC ~ 11 GHz - PL-259 Connectors are not recomended for use above 300Mhz (See N Male options)