G.I. Type Emergency Strobe LightNo outdoorsman or boater should be without this G.I. type emergency strobe light. This brilliant light flashes 60 times per minute and is visible for one mile under normal atmospheric conditions. It is constructed from tough ABS plastic, meets Coast Guard specifications, is ISO 9001 certified and is shock and water resistant. A one year manufacturer's warranty is included. Requires 1 alkaline D-Size battery (not included).