The LG-489 is a seamlessly integrated laser sight for Smith & Wesson's M&P Shield 9mm & .40 S&W concealed carry pistol. This Laserguard is designed to match the unique design of the pistol, and features our patented Instinctive Activation - meaning the laser is activated when the gun is held in a natural firing grip. Quickly installed with no gunsmithing required, the LG-489 is also fully adjustable for windage and elevation. Product Specifications Product Type: Rail Master Material: Polymer Attachment: Trigger Guard Activation Location: Front Activation Sighting: Factory Sighted at 50' Battery Type: One 1/3N Lithium Battery or Two 357 Silver Oxide Batteries Laser Battery Life: Over Four Hours Activation Mode: Pressure Activation Installation: User Installed Warranty: Three Year Full Warranty Color: Black Dot Size: Approx. 0.50" at 50'