The WILD2 provides 1000 lumens of white light with up to 1.5 hours of runtime. Ultra-light and durable, weighing 4.7 ounces, it provides a well-defined hotspot with the perfect balance of spill. Wild2 is primarily made out of 6061-T6 aluminum and a Type III MIL-SPEC hard anodize finish. The device is impervious to dust, sand, and dirt, and is waterproof to 66 feet. Mount the Wild2 in seconds to any gun equipped with a 1913 (e.g., Sig Sauer P320) or Glock Universal (e.g., Gen 3 or Gen 4 Glock) rail. Transition between rail types by reversing the patented INFORCE crossbar in the mounting fixture. All three functions "constant, momentary, and strobe" are activated by pressing laterally on either the left or right paddle. Battery Installation Unlock the patent pending battery door by pressing the button on the top plate.Button deliberately inaccessible when the device is attached to your firearm. Pull the door free of the battery compartment and rotate it open around its steel-pin.Insert two new 123A lithium batteries, rotate the door closed, and relock it with a firm press and snap. Mount the Wild2 in seconds to any gun equipped with a 1913 (e.g., Sig Sauer P320) or Glock Universal (e.g., Gen 3 or Gen 4 Glock) rail..Transition between rail types by reversing the patented INFORCE crossbar in the mounting top plate.