The SureFire M300 Mini Scout Light, powered by one 123A lithium battery, is a compact, lightweight, powerful LED WeaponLight that mounts securely to any Mil-Spec Picatinny rail via an integral thumbscrew clamp. Its recoil and shock-proof LED emitter is focused by a TIR lens to create a high-intensity 200-lumen beam with plenty of reach for close- to medium-range applications with enough surround light to optimize situational awareness. The M300 can be fitted with either of two different switches, both included. The first is a tape switch with a 7-inch cable that provides fingertip control without altering your grip on the weapon -- press the user-positionable pad for momentary-on. The second is a click-type tailcap pushbutton switch -- press for momentary-on, press further until it clicks constant-on.Like all our Scout Light models, the M300 Mini Scout Light is machined from high-strength aerospace aluminum with Mil-Spec hard anodizing built tough enough for combat conditions without weighing your weapon down.