FMM-1 is a standard-sized module (typically mounts to a 4" [10.16 cm] square box) that supervises either a Class A (Style D) or Class B (Style B) circuit of dry-contact input devices.
The SpectrAlert Advance SPSRK is a red, outdoor speaker strobe for wall installations with selectable strobe settings of 15, 15/75, 30, 75, 95, 110 and 115 cd.
The SpectrAlert Advance PC2WHK is a white, two-wire, outdoor, ceiling-mount horn strobe with selectable high-candela strobe settings of 135, 150, 177 and 185 cd. Outdoor back box included.