YASONG SLA-S001 130dB Portable Highway Maintenance Alarm Siren, 100W, 20Ah Battery, Red Blue Strobe Plug-in Alarm Sirens This model works by power-on

This model works by power-on operation: the alarm starts when powered on

0–130dB adjustable volume for different site needs

12 built-in alarm tones and a LED strobe warning light for farms

IP65 protection for outdoor use

as the page shows both power-on trigger and remote-control trigger information

YASONG SLA-S001 130dB Portable Highway Maintenance Alarm Siren, 100W, 20Ah Battery, Red Blue Strobe Plug-in Alarm Sirens This model works by power-onThe YASONG SLA S001 portable highway maintenance alarm siren is designed for road work, highway maintenance, tunnel construction, emergency rescue sites and temporary outdoor safety warning areas. This model combines a 300W maximum power alarm system, 130dB adjustable sound, red and blue LED strobe warning lights and a built in rechargeable lithium battery. It supports portable movement with a handle and pull rod structure, making it suitable for