Laser sight Projects a red beam Windage & elevation adjustment screws (use an Allen wrench) Fits a Weaver rail* Requires 3 LR44 batteries (included) Fits standard Weaver rail. Package may state it fits only a 1" rail. This is incorrect. *To secure the Crosman laser sight to your gun, you have push in the buttons on the side of the laser. Otherwise, the fit will not be snug and the laser will flop around.