Klarus has redesigned its immensely popular XT11 platform to include a handy side switch and an advanced XM-L2 LED. The ST11 can produce up to 900 lumens in high mode and features the same single 18650 (or 2 x CR123A) power source as its XT11 cousin. An ultra-strong aluminum body and stainless steel bezel ring ensure rugged performance even in the harshest conditions. A powerful strobe is ideal for tactical situations and can be accessed from any mode by double pressing the tail switch. A side switch serves to select outputs. This model features a smooth reflector for a more focused beam pattern. Features: Patented tail-cap & side switch design Easy access strobe can be activated any time Ergonomically designed for one-handed operation Tail cap allows "Candle Stand" for hands free lighting Stainless steel bezel design protects lens and reflector Intelligent control circuits balance brightness, run-time, and heat emission for improved performance Specifications: LED: 1 x XM-L2 Uses 1 x 18650 or 2 x CR123A (Batteries not included) Output (Runtime): HIGH: 900 Lumens (2.3 hr) MEDIUM: 225 Lumens (6.7 hr) LOW: 15 Lumens (100 hr) MOONLIGHT: 1 Lumens (700 hr) Peak Beam Intensity: 7,817 cd Maximum Throw: 580 ft (177 m) Impact Resistance: 3.28 ft (1 m) Water resistance rating: IPX8 Reflector: Smooth Finish: Black Dimensions: Length: 5.55" (141 mm) Tube Diameter: 0.99" (25.4 mm) Head Diameter: 1.41" (36 mm) Weight (Excluding Batteries): 5.15 oz (146 g) MPN: ST11-SMO