The SD-651 is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt, and insects.
The SpectrAlert Advance SPSCWK-R (replacement model) is a white, outdoor speaker strobe for ceiling installation with selectable strobe settings of 15, 15/75, 30, 75, 95, 110 and 115 cd. Offers mounti