Powerhouse TEP 4" Inch 6 Tone High db Car Alarm Replacement Siren Designed by Powerhouse TEP. Universal 4" Inch 6 Tone Car Alarm Siren Replacement. Works with any stock or aftermarket car or truck alarm system. Simple 2 Wire Installation. Operating Power; 12V, 35 Watts Sensitivity; 119 db +-3db @ 8 Ohm