This WilsonPro 971117 N Female to N Female Barrel Connector can be used to connect 2 Wilson 400 coax cables with N male adapters. And you can use this barrel connector to join together components of cell phone signal booster kits.. N-female to N-female barrel connector. Connects together 2 WiILSON400 coaxial cables with N-male adapters. For use in joining components of cell phone signal-booster kits. 3-year warranty from purchase