The Rail Master Pro Universal Green Laser Sight & Tactical Light combines two tactical tools in a single compact unit. The versatile unit is designed to fit most modern pistols, rifles and shotguns with an M1913 Picatinny or Weaver-style accessory rail. A powerful green laser anchors the unit and provides up to 1 hour of continuous use on a single CR2 Lithium battery. The Rail Master Pro also includes a powerful 100 Lumen white light for target identification. The unit features four operational modes including: Laser/Light Constant On, Laser Constant On, Light Constant On, and Laser w/Light Dazzler. Activation is instant, with Tap On, Tap Off controls and a programed Auto Shut Off at five minutes to conserve battery life. Product Features Material: Polymer Attachment: Accessory Rail Activation Location: Switch Activation Sighting: Factory Sighted at 50 Feet Battery Type: One CR2 Lithium Battery Laser Output: Up to 5mW Green Laser Activation Mode: Switch Activated Laser Visibility: Approx. .5 Inch Diameter at 50 feet User Adjustable: Windage and Elevation Dot Size: Approx .5 Inch at 50 Feet Light Output: 100 Lumen LED White Light Light Specs: 100 Lumen LED