You need to protect your communications system!!! PolyPhaser coaxial RF surge protector (also known as lightning surge protector, lightning surge arrestor or suppressor) VHF50HN-B helps protect your equipment from electromagnetic pulse (EMP) or power surges that are commonly caused by lightning or other strong electrical changes. VHF50HN-B is constructed with a female gender for the input and female for the output. This F/F type N to type N surge protecting component for RF has a let-through energy of .5uJ. The coaxial lightning surge arrestor is IP rated, it has an IP67 rating. Type N coaxial lightning surge protector is REACH and RoHS compliant. Specs: VHF50HN-B Impedance 50 Ohm Connector In Series N Connector In Gender Female Connector Out Series N Connector Out Gender Female Minimum Frequency 100 MHz Maximum Frequency 512 MHz Maximum Input Power 750 Watts Direction Directional Throughput Energy 0.5 uJ