BK Technologies (Relm) KZA0595
Site Authentication, Factory Install
Option for RELM / BK KNG-P150, KNG2-P150, KNG-P400, KNG2-P400, KNG-P500, KNG2-P500, KNG-P800, KNG2-P800 radios
Must have KZA0577 and KZA0579. Item is an option and cannot be sold separately