【Wide-band & Connector & Impedance】- DC-3GHz / F Female to Female / 75 ohm 【Protection】 - Requires additional ground cable. Protect your equipment from dangerous lightning strikes or electrical surges by installing the lightning arrestor between the amplifier and the outdoor antenna. 【Feature】-Replaceable Gas Tube Element 90V with High Surge Power Capability 【Tips】 - Lightning protector should be installed as close a possible to the equipment to be protected, often at the point where the coax cable enters the building. They can also be installed near the antenna for additional protection. 【Package】 - 1 x Lightning Arrestor