Larson Electronics’ SL-360-M-W is a magnetically mounted, battery-powered, 360-degree beacon that operates up to 40 hours on 4 AA batteries. It is portable and contains a 20-LED lamp assembly that produces a brilliant signal visible for extended distances. Also available in amber and red, it is durable and shock- and vibration-resistant. It is 5 in. in diameter by 4½ in. high. This strobe flashes once per second. It is designed for towing, forklifts, cranes, trailers, security, warehouses and more.