SureFire M640V IR Scout Light Includes MLOK Mount and Z68 Tailcap The SureFire M640V is an infrared scout light with an additional visible, bright white output. The M640V is built with a brand new low-profile mount which allows the user to optimally postion the light, which is great for tactical users of all kinds. Complete with a 350 lumen output with a 2.5 hour runtime, this weapon light is great for medium to long-range encounters which is further optimized by the TIR optic. An additional IR output provides a 120mW wavelength that can last for 16.75 hours. The IR output is optimized to assist with aim. Toggle between the two outputs with quick-on-the-fly switching that's granted by simply rotating the bezel. To activate those outputs, simply use the push-button Z68 tailcap and the M640V is ready to go. Features: New low-profile Picatinny mount design provides unprecedented versatility Recoil-proof and virtually indestructible LEDs that produce maximum lumen output and runtime On-the-fly switching via bezel between IR and white outputs TIR optical lens provides a far-reaching beam Reliable push-button activation with Z68 tailcap Lightweight aluminum housing Scratch and corrosion-resistant hard-anodized finish Available in black or tan Included Accessories: MLOK Picatinny Mount Z68 Tailcap 2 x CR123A Batteries Specifications: Power Source: 2 x CR123A Batteries Output / Runtime (White): 350 lumens / 2.5 hours Output / Runtime (IR): 120mW/860nm / 16.75 hours Dimensions: Length: 5.5" Bezel Diameter: 1.125" Weight: 4.8oz