The SpectrAlert Advance P4RK-R (replacement model) is a red, four-wire, outdoor horn strobe with selectable strobe settings of 15, 15/75, 30, 75, 95, 110 and 115 cd. Offers mounting plate only - no ba
The SpectrAlert Advance SWHK is a white, outdoor strobe with selectable high-candela strobe settings of 135, 150, 177 and 185 cd. Outdoor back box included.