POLYPHASER~Coax Micro NF/NM DC short, bi-directional operation coaxial RF protector, engineered for high power of combined signals operating between 300 MHz and 1.2 GHz DC Block Bulkhead Mount Surge Side Connector Bi-Directional D Protected Side Connector Bi-Directional D Frequency Range 300 MHz to 1.2 GHz RF Power 2.5kW @ 400MHz Insertion Loss<0.1 dB Protocol/Applicationdc short/rf, weatherproof when installed