THESE PRINTED CIRCUIT BOARDS ARE TESTED AND CERTIFIED FACTORY O. (LOWER 48 STATES ONLY). MARINE AIR SYSTEMS_DOMETIC, PASSPORT I/O, PRINTED CIRCUIT BOARD. PCB-372-00I, IS A LATER DESIGN VERSION WITH A LEGACY MODEL BILL OF MATERIALS. PRINTED CIRCUIT BOARD SUPPORTS ANY UNIT WITH A PASSPORT I/O DIGITAL WALL DISPLAY. THERE ARE NO EXCEPTIONS!!! NEVER USED OR INSTALLED…. PCB (PRINTED CIRCUIT BOARD) IS A LATER DESIGN VERSION WITH A LEGACY MODEL BILL OF MATERIALS.