This model works by power-on operation: when powered on
Rechargeable battery design for portable warning use
dust and outdoor environments
making it suitable for two bikes or for keeping one unit as a backup
0–120dB adjustable siren volume controlled by button
YASONG SLA-S001 130dB Portable Highway Maintenance Alarm Siren, 100W, 20Ah Battery, Red Blue Strobe Product Size:46.2 x 34 x 19.5cm 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