The SOS Distress Light is the first and only LED Visual Distress Signal Device approved by the United States Coast Guard to completely replace traditional flares. Unlike traditional flares, this electronic flare never expires, which eliminates the challenge of flare disposal. Floating electronic flare can be hand-held, tethered or hoisted aloft. Runs up to 60 hours on three C-cell alkaline batteries (not included). Flashes only SOS light sequence. Includes daytime distress flag. Floats with lens up to optimize vertical and horizontal light beams. Family and boat safe no flames! Visible up to 10 nautical miles. Made in USA. 8.5H x 4.5W. Type: Safety.