ThruNite TN20 --- Reliable Duty Light: Rotatable Front-angled Head, Magnetic Tail, Titanium Coated Reversible Stainless Steel Pocket Clip, Knurling for Firm Grip, Waterproof, Strobe and Turbo, Memory with Six Modes, Low Battery Indication. Its compact design fits comfortably in your pocket, backpack, or anywhere else you keep your light This reliable duty light features its rotatable front-angled head (L-shaped) for special use. The TN20 output is up to 770 lumens and its runtime is 1656 hours. Titaniumcoatedreversiblestainlesssteelpocketclipfordurabilityandconvenience. Memory function to set any mode (except for firefly, turbo and strobe) for immediate use.