58000-005APO Discovery Open-Area Sounder VID - Red Body (Red Flash)58000 005APO Discovery Open Area Sounder VID Red Body (Red Flash) The Discovery Open Area Sounder Visual Indicator makes full use of the Discovery protocol and has been designed for use in indoor and open areas. When the fire system is being commissioned a 'Magnetic Wand' can be used to adjust and test each sounder locally. Key Features: 15 tone pairs Individual control of the sounder and visual indicator Volume and tone settings can be selected from