Tacticon Armament Compact Laser Sight Black. The built-in 20mm picatinny rail attachment is tightened with the included allen key. Two full sets of LR41 batteries included boasting an impressive 1 hour of run-time from such a small laser. This compact laser sight is push button activated and can be comfortably used on both pistols and rifles. Specifications for Tacticon Armament Compact Laser Sight: Manufacturer: Tacticon Armament Color: Black Beam Color: Red Laser Output: 5 mW Wavelength: 625 - 650 nm Attachment Type: Picatinny Length: 1.5 in Width: 1.25 in Height: 1 in Weight: 1 oz Fabric/Material: Aluminum Alloy Mount Type: Picatinny Features of Tacticon Armament Compact Laser Sight Windage and elevation adjustable. Easy operate On/off press-button switch in the back of the laser sight. Detachable 20mm weaver rail mounts securely onto standard pistol rail. Package Contents: Tacticon Armament Compact Laser Sight Rail Wrench Battery Wrench Windage/Elevation Adjustment Wrench (6) Batteries (only takes 3 extra set included) Tacticon Armament LS20: Compact Laser Sight Black