Crimson Trace LL-801 Laserguard Pro Red Laser Sight and Tactical Light for Smith & Wesson M&P 9mm and .40 S&W Pistols POWERFUL RED LASER & LED WHITE LIGHT: Features a 5mW peak, 620-670nm, Class 3R visible red laser - the brightest beam allowed by law - with a 150 Lumen LED tactical white light. INSTINCTIVE ACTIVATION: Front activation button engages the laser and/or light for immediate laser and/or light activation from either side of the unit. This is the feature that sets Crimson Trace apart from the rest. Includes Laser + Light, Laser Only, Light Only and Laser + Light Strobe modes. OVER TWO HOURS OF BATTERY LIFE: Powered by one CR2 Battery (included). This product is eligible for Crimson Traces Free Batteries For Life Program. FITS: Smith & Wesson M&P Shield and M&P Shield M2.0 9MM and .40 S&W. Does not fit models with integrated laser. EASY INSTALLATION: User installed- no gunsmithing required. Factory sighted at 50 feet, but is fully user adjustable for Windage and Elevation with provided tool. This model features a master ON/OFF switch for completely powering down the unit. WARRANTY: 3 Year Manufacturer Warranty and FREE Batteries for Life