The crimson trace lasergrips platform is a decisive tactical advantage for handguns and changes the way gun owners approach personal protection.It offers immediate targeting laser beam when you hold your gun in a natural firing grip.The instinctive activation saves precious time when seconds count.The lasergrips features a master on/off switch, easily user-installed with zero modification to your firearm and are completely user-adjustable for windage and elevation.*note- fits all metal frame ruger p-series pistols, including 85, 89, 90, 91, 93, 94 and 944.Power Switch: On/OffWavelength: 633nMDot Size: .50" @ 50 ftPower: 5mWRange: 50 ftWeight: