Rockford Fosgate Universal Amplified 12 V Antenna The Pmx-Ant is a powered antenna which is designed to increase Fm/Am and WB (weather band) stations. Its universal connectivity allows for a variety of usage. Features Universal Am/Fm/Wb antenna 12Vdc powered for +20dB signal gain Omnidirectional Element ready Ip67 certified Double sided tape mounting Quick power connect for easy installation