UMAREX OPTICAL DYNAMICS ILLUMINATOR GEN 1 40MM KIT The OD40 Kit with mount and cord switch is a long distance illuminator that projects a true collimated, focused beam of high definition light that has been created specifically for game identification. It creates a crisp, clear, focused circle of light at long distances. The OD40 is a compact, lightweight and easy to handle or mount onto a scope or rail with the Optical Dynamics mount. The OD mount is equipped with windage and elevation adjustments that allow you to directly adjust to the light to accommodate your optics for clear viewing of the target up to 200 yards. The light weighs 14 ounces with the two CR123A batteries that provide constant operation up to 100 minutes. Constructed of aircraft grade aluminum, the OD40 is shockproof and resistant to water with momentary submersion. It measures 8-1/2 inches long and is less than two-inches in diameter at its widest point. The OD40 mounts to a Picatinny rail or to a rifle scope using the included fully adjustable mount.