Wolo 4000 Alert 12-Volt/50-Watt Electronic Siren and PA System Powerful 50-watt, 12-volt electronic siren Three different functional siren sounds plus a P.A. system Built with state-ofthe-art electronics throughout to provide years of dependable service Compact size of the siren controller makes mounting possible in vehicles that have limited available open space in the dash area Complete with a 100-watt RMS speaker, plug-in microphone, metal mounting bracket and mounting hardware