Do not be fooled by inferior, cheaper, overseas products.  Buy US made quality!

The Federal Signal MS4000 series mini-siren is advanced, efficient, and economical. It offers value-packed, reliable performance with effective traffic clearing capability.  Dimensions: Amp 1.5”H X 6.5”W X 5.5”D

Features

• Economical, compact siren mounts virtually anywhere
• Built-in intersection clearing feature
• Wail, yelp, priority, manual (peak and hold), and air horn tones included
• Two rugged switches control all siren functions
• 100-watt output – meets Class A with just one Federal Signal speaker