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12 alarm tones with side-button adjustment
It is suitable for factories
The YASONG SLA-01HY remote control alarm siren combines a 0–120dB adjustable horn
LED strobe warning for clear audible and visual alerts
YASONG 110dB Hand Crank Siren, Manual Portable Emergency Alarm Horn, No Power Required, Red or Green Wi-Fi Network Alarm Systems & Sirens 12 alarm tones with side-buttonThe YASONG hand crank siren is a manual emergency warning horn designed for locations where power supply may not be available. It is suitable for factories, homes, schools, warehouses, flood control areas and temporary emergency warning use. This model works by hand operated cranking, so it does not require wiring, batteries or charging. The faster the handle is cranked, the louder the siren sound becomes. Manual hand crank operation with no power
