Low profile finger grooves for fast grip registration Slim-line styling and double-palm swells provide unsurpassed ergonomic comfort Full front to rear rubber wrap-around design reduces felt recoil Instinctively activated by a right or left hand grip Fully adjustable for windage and elevation Master on/off switch for complete system override The LG-326 fits Sig Sauer P226 models The LG-329 fits Sig Sauer P228 and P229 models The LG-320 fits Sig Sauer P220 models SPECIFICATIONS: Activation: Dual integrated momentary pressure switches, and master on/off switch on LG305 only. Beam Intensity: 5mw peak, 633nm, class IIIa, high intensity laser beam. Maximum output that federal law and technology allow. Also available in infrared for law enforcement and military only. Dot Size: Approximately 0.5" diameter at 50 feet. Adjustment Capability: Sight-lock windage and elevation calibration. Power Source: Two long life #2032 lithium batteries. Over four hours of on-time use and a five year shelf life. Warranty: Three-year full warranty.