Introducing Streamlight's first virtually indestructible, super-bright, nylon polymer tactical light! Super bright and compact personal light available in power LED technology. The light uses CR123A Lithium primary cells. C4 LED 2-3X brighter than High Flux LED! 4, 800 candela peak beam intensity; 120 Lumens, Solid State Power Regulation that provides maximum light output throughout battery life, Run time up to 3 hours, Tailcap push button provides one-handed momentary or constant "on" operation., High impact super tough nylon polymer for exceptional durability and a sure grip, 5.22" Long; Lightweight, just 4.1 Ounce , IPX7 rated design; waterproof to 1 meter for 30 minutes, Powered by two 3V CR123A lithium batteries (included).