PowerTac E3 Keychain Waterproof Flashlight CREE LED 90 Lumens-Uses 1 x AAA, firefly and Max output Modes Uses Cree XP-E R4 LED with a lifespan of 50000 hours, Slightly twist the head tighten to firefly(3 Lumens), tighten further for max output (90Lumens) 7.2cm (Length) x 1.4cm (Diameter); only 20g weight (excluding batteries) Available in blue, orange, red, green and black. Please specify the color desired using the drop down above Reverse polarity protection, to protect from improper battery installation Made of durable aircraft-grade aluminum, Waterproof to IPX-8 Standard