Details :
A mini motor siren (most commonly recognized by the industrial model designation MS-190) is a compact, high-intensity emergency audio device. Unlike standard electronic piezos or piezo bells, it utilizes a physical electric motor to rapidly turn an internal impellor/wind-screw, generating a piercing, high-pitched air-raid-style acoustic tone. This mechanical design allows it to break through high ambient industrial noise in workshops, hoist zones, and security perimeter lines.