Strobe Wall Mount, Finish Red, Alarm Current 0.191, Flash 15/30/75/110 Candela, Height 27/32 In, Length 4 1/2 In, Width 2 3/4 In, Voltage 24VDC Fire Alarm Output DevicesIndoorSignals are hardwired from a control panel (sold separately).For loud areas and where occupants use hearing protection or are hearing impaired.UL and C-UL Listed, CSFM Approved. Edwards fire alarm and horn strobes are UL 1971 listed for the hearing impaired. Ceiling speaker 6VEZ2 is UL listed 1480 for use as a fire alarm signalling device.Visual Signals