The new WILD1 is lightweight, fast-activating and with two hours of run time, it&';s a go-to for any handgun owner. An optimal-blend of throw and spill, this compact-sized light provides a concentrated hot spot and convenient paddle activation. Made from 6061-T6 aluminum with Type III MIL-SPEC hard anodized finish for greater durability, securely attach this light in seconds to any 1913 or universal rail. Constant and momentary functions are easily 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 Wild1 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.