Polyphaser Lightning Surge Protector. This is a very important item to consider when installing a base station on your building or tower where the antenna is expected to rise to the same elevation or above neighboring buildings.
800-2500 MHz protector. Used in installations when DC is required to pass in route to powering shelter-based equip. +6 VDC. Connectors: N-Female on each end.
Cables attaching to this fitting need to have N-Male connectors on each end. The fitting is typically mounted within a couple feet of your antenna.
It MUST BE GROUNDED very well