ACR Electronics C-Strobe - Life Preserver Emergency Signaling Strobe LightThe slim, lightweight design keeps it out of the way until needed. The Carded C-Strobe is supplied with a C-Clip adapter for life jackets grips snugly around most oral inflation tubes. Both Carded and Bulk is supplied with a steel clip and Velcro strap that provide additional mounting options on backpacks and webbing Intense strobe light visible up to 2 miles (3.2 km) Waterproof and corrosion resistant case New attachment pin engages top cap; prevents accidental disassembly Designed to meet the demands of sea, ideal for car, boat crew, campers, crisis or whenever a reliable efficient light is needed Slim, lightweight design Comes with steel clip and adjustable Velcro strap; can be mounted on bicycle frame, pole, etc. More than 8 hours continuous operation.