ESP MAGDUO Two Wire Ceiling Sounder for MAGDUO Red | MAGDUOSRESP MAGDUO Two Wire Ceiling Sounder for MAGDUO Red MAGDUOSR The ESP MAGDUO Ceiling Sounder in Red for use with the MAGDUO Two Wire Fire Alarm Systems comes complete with Volume level adjustment and Built in End of Line function Features Ceiling mount sounder Volume level adjustment Built in End of Line function Device wiring base included