The SpectrAlert Advance HRK-R (replacement model) is a red, 12/24-volt horn for outdoor ceiling or wall installation. Offers mounting plate only - no back box included.
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 SRHK-P is an unmarked, red, outdoor strobe with selectable high-candela strobe settings of 135, 150, 177 and 185 cd. Outdoor back box included.