A personal locator light that automatically activates in water, the UST See-Me 2.0 Strobe Light flashes 60 times a minute with a visibility range exceeding the USCG requirements. On the trail or on the water, this safety beacon could save your life. A lifetime LED bulb flashes 60 times per minute with 45 lumens of light. Visibility exceeds the USCG requirement of 1 nautical mile (1.9 km) and can be seen for 3.1 miles (5 km) on a dark, clear night. Activates when submerged in water; will not automatically activate with rain, sea spray, or high humidity. An easy twist on/off for manual activation. Powered by two AA alkaline batteries (not included). Max. burn time of 120 hours. Rated IPX7, waterproof to 3.3 feet (1 meter) for 30 minutes. Includes PFD clip, lanyard cord and hook-and-loop strap.