Delta ForceA(R): The ultimate in tactical lighting design with extra durable thick-walled anodized aluminum construction for heavy-duty use in extreme conditions. Includes: Tail Cap ON/OFF Switch With Crenulated Head For Self-Defense Spring Steel Clip Specs: 490 Lumens High, Low, and Strobe Modes Beam Distance Of 200 Meters Runs On (2) CR123 Batteries (Included)