Hand Operated Siren

A Hand Operated Siren is designed to provide effective warning in applications where there is no power supply such as camp sites, civil defense, mountain rescue and coast guard warning. It is designed as a backup alarm when there is a power failure or applications in remote areas where no electricity is available, blasting sites etc. The siren works by manually turning or cranking the handle a few times to produce a sound slowly getting louder for every turn. Hand Operated Siren is very useful.