The See-Me™ 1.0 Steady-On Light personal locator emits 360° of light for maximum visibility in all directions. On the trail or on the water, it’s the perfect companion for your pack or personal flotation device ensuring you can be located quickly in an emergency situation.20 LumensUp to 17 hours run timeWaterproof IPX7Visible 3.4 miles (5.5 km) on a dark, clear night which exceeds USCG requirements of 1 nautical mile (1.9 km) visibilityEasy twist On/OffLanyard cord and hook-and-loop strap includedRequires 2 x AAA alkaline batteries (not included)