BARSKA Tactical Red Laser Sight System with Flashlight and Mount Product Details Product Dimensions: 3.2 x 3.2 x 2.8 inches ; 9.6 ounces Shipping Weight: 9.6 ounces Domestic Shipping: Item can be shipped within U.S. International Shipping: This item is not eligible for international shipping. Learn More Origin: China Item model number: AU11005 Batteries 4 LR44 batteries required. (included) Includes Tri-rail barrel mount. 2 wired remote presuure swiches. Can be mounted to any rife or shotgun. Laser can be ajusted for sighting in windage and elevation @ 100 yards. Tactical Flashlight is Super bright. Tactical Red Laser Sight with Flashlight and Mount, includes riser bar.Improve accuracy in the dark with this must have system that combine theprecision of a laser sight with the illumination of a high intensityflashlight, leaving no doubt in your mind where your shot is headed. Specifications: Tube Diameter (mm): 19 Output power: