The adjustable mount has 2 screw holes but only ONE screw is included and needed, choose one screw hole and use the screw to secure the unit on the rail. To use this product, your gun must have the Picatinny rail. This Light will NOT fit a Taurus g2c g3c. LED light and laser sight can be turned on or turn off independently, therefore, you may have combinations of light and laser, light (strobe mode available) only, and green laser only. Will not fit XD or alike. We are calibrated for accuracy before shipment,you can adjust and zero-in this laser just like any other sight, Use the elevation and windage wrenches included. Contact us if you have any concerns. Our products can be used in combat situation, So ZERO risk purchase. The LED Flashlight and Blue Laser sight are powered by a Built in rechargeable battery, which is charged with a Micro USB charging cord. The green laser can used to 5 hours. The powerful battery life allows you not to worry about running out of power. Extreme bright LED gun flashlight and laser sight combo. Precision laser sight, blue beam intensity/wavelength: <5 mW peak, 450 nm, laser Class 3a. It meets US safety standards.

Night vision: No. Mounting Type: Picatinny Mount. Compatible Devices: Handgun. Sport Type: Hunting. Style: Picatinny. Color: Black. Brand: Gmconn. Date First Available: October 25, 2021. Best Sellers Rank: #40,796 in Sports & Outdoors. Customer Reviews: 4.3 out of 5 stars 187 ratings 4.3 out of 5 stars. : B09K7MNV8B. Sport Type: ?Hunting. Style: ?Picatinny. Manufacturer: ?Gmconn. Color: ?Black. Brand Name: ?Gmconn. Package Weight: ?0.15 Kilograms. Item Package Dimensions L x W x H: ?3.7 x 2.87 x 1.85 inches.