Extremely loud (119db) Smaller - mounts directly to wall or 4 electrical box Dual tone output - steady and warble Ready to mount - no disassembly required Tamper proof and weather resistant Attractive, can be used indoors or outdoors Snap on trim ring conceals screwsSelf Contained Indoor SirenAt 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.The ASC Edge Significantly louder 119db output Smaller...mounts directly to wall or standard 4" electrical box Dual tone output...steady and warble Ready to mount...no disassembly required Tamper proof and weather resistant Attractive, can be used indoors or outdoors