Simplex 49AV-WRF TrueAlert ES Wall Mount Addressable Audible Visible Appliance Red Cover FIRE Wording Clear LensSimplex 49AV WRF TrueAlert ES Wall Mount Addressable Audible Visible Appliance Red Cover FIRE Wording Clear Lens. TrueAlert ES addressable A Vs are individually addressed audible visible notification appliances that receive power, supervision, and control signals from a Simplex FACU providing IDNAC Signaling Line Circuits (SLCs). Additional information Weight 2 lbs Manufacturer Johnson Controls Brand Simplex Condition New Type Horn Strobe Color Red