Prewire Entire System, Then Install Your Signals Ease of Supervision Testing Super Slide Checkmate Feature: Instant Voltage Verification Lower Installation and Operating Costs Input Terminals 12 to 18 AWG Switch Selection for High or Low dBA Switch Selection for High or Low Frequency 1500 3000Hz Tamperproof Re entrant Grill Surface Mount with the GCSB Gentex Surface Mount Box Synchronize Strobe and/or Horn by Using Gentex Synchronization Module. AVSM Silence Horn While Strobes Remain Flash