Sized for attaching to a key ring, the tiny UST BrightForce Pico LED flashlight has a bright clean light with up to 20 Lumens that runs for up to 15 hours on four LR41 batteries (included). A carabiner makes it easy to quickly clip to tents, backpacks, belt loops, car keys, and more.<br>The tough anodized aircraft-grade aluminum with a silicone O-ring seal gives it an IPX4 water resistance rating (protected against splashing water from all directions). It features an unbreakable lifetime LED that never needs to be replaced, 15-meter light reach, and rugged knurling on the bezel for easy off and on control. Weighing 0.4 ounces (11 grams), it measures 1.5 x 0.5 inches (38 x 13 mm). It's backed by a manufacturer's limited lifetime warranty.<br>UST Brands has been manufacturing camping, survival, personal safety, and emergency preparedness equipment for over 80 years, including innovative LED lights, all-weather fire starters, premium outdoor cutting tools, camp kitchen products, first aid kits, unbreakable signal mirrors, and more.