The best quality industrial electric siren. The best quality sound of the siren from the manufacturer MM Enterprises. The alarm sounds through the motor that drives the wind-helical alarm. So it emits the sound of the drill. The sound range is 100 meters. The motor drives a true sound. Good sound and durable product. Strong and Suitable for residential buildings, offices, factories, schools, shops, stores, hotels, factories, public places and more. Perfect for use on boats, police, ambulance and other emergency vehicles. Can also be used as a burglar system in automobiles and buildings.