NEBO®'s PROTEC Green Laser Firearm Sight uses a 5 milliwatt, 532 nanometer laser to sight over 500 yards away. The Green Laser can be seen up to 100 yards in broad daylight and the batteries will produce 4 hours of continuous runtime. The compact body of the PROTEC Laser Sight is constructed of light aircraft-grade anodized aluminum, making it a lightweight, yet powerful laser sight. Plus, it is completely waterproof. The on-off switch located on the side provides convenient one-finger operation. A small hex screwdriver is included to adjust the windage and elevation.