Recipient of multiple awards for innovation, this is the only electronic distress flare that meets U.S. Coast Guard requirements for night use. Unlike traditional flares that flame out in minutes, the patented distress light flashes an SOS signal for over 60 hours to help first responders quickly reach you in an emergency. Its bright white LED is visible up to 10 nautical miles away and shines horizontal or vertical beams for maximum visibility. Waterproof and submersible, it floats with the lens up, turns on with a quick twist, and never expires. Comes with a 3' square day time distress flag. Requires three C batteries. Made in the U.S. 8 1/2" L x 4 1/4" diameter. (13 1/2 oz.)