YASONG 110dB Hand Crank Siren, Manual Portable Emergency Alarm Horn, No Power Required, Red or Green Color:Green and the blinking mode is

and the blinking mode is not adjustable

telecommunications rooms

Sensor accuracy may be affected by installation position and strong daylight

base type and DC12V power compatibility before ordering

3 remote controllers included for convenient alarm operation

YASONG 110dB Hand Crank Siren, Manual Portable Emergency Alarm Horn, No Power Required, Red or Green Color:Green and the blinking mode isThe 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