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    Ademco 748 Siren

    At 119 db, the 748 is the loudest self-contained siren you can buy today. The fully tampered and weather-resistant 748 mounts directly to a 4″ electrical box or wall — eliminating the need for a cabinet. Priced below other sirens, the compact design of the attractive 748 makes installation easier than ever before — indoors or out.