Marquis Spa Circuit Board by Balboa Water Group. For 1999 Euphoria CS, Reward CS, Reward RS, Destiny CS, Destiny RS, Quest CS And Quest RS Models With RCRTNLR3E Chip. Used In 1998 Reward CS, Euphoria CS, Destiny CS, Quest CS, Resort RS, Retreat RS And Mirage RS Models With RCR Chip. Balboa 51800