A wall speaker strobes include a variety of features. That increases application flexibility and simplifies installation. Field-selectable settings, including candela, speaker voltage, and power settings. The automatic selection of 12- or 24-volt operation enables installers, to easily adapt devices, to meet requirements. SpectrAlert Advance offers the broadest line of outdoor speakers and speaker strobes, in the industry. From metal and plastic outdoor back boxes to white and red plastic housings to walls. And ceiling mounting options, SpectrAlert Advance can meet virtually any application requirement. Wall-mount outdoor speakers and speaker strobes can b e used indoors or outdoors in wet or dry applications. And can provide reliable operation from −40°F to 151°F. These speakers provide a broad frequency response range, low harmonic distortion. And maintain a high sound pressure level at all tap settings. To provide accurate and intelligible broadcast of evacuation messages. Use a universal mounting plate with an onboard shorting spring that ensures wiring continuity b efore devices a re installed. Installers can verify proper wiring without mounting the devices. Exposing th em to potential construction damage.