YASONG 110dB Hand Crank Siren, Manual Portable Emergency Alarm Horn, No Power Required, Red or Green Color:Green The YASONG SLA-01HY-2000-3 is a

The YASONG SLA-01HY-2000-3 is a wireless remote control alarm siren with a 0–120dB adjustable horn

3 remote controllers included for convenient alarm operation

the alarm can be triggered by commands sent through the RJ45 Ethernet interface using the TCP underlying protocol

Sensor accuracy may be affected by installation position and strong daylight

YASONG 110dB Hand Crank Siren, Manual Portable Emergency Alarm Horn, No Power Required, Red or Green Color:Green The YASONG SLA-01HY-2000-3 is aThe 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