The LG-207 LaserGrips feature a hard polymer snag-free grip surface and are shaped and sized like the stock Smith & Wesson grips. (Grips/Laser only, gun not included). Specifications: - Activation: Instinctive Activation; Front Button - Material: Hard Polymer - User Adjustable: Both Windage and Elevation - Master On/Off Switch: Yes - Warranty: 3 Years Complete - Beam Intensity: 5mw peak, 633nm, class IIIa laser. Maximum output that federal law and technology allow. - Dot Size: Approximately 0.5" diameter at 50 feet. - Power Source: Two #2032 lithium batteries (included); over four hours of on-time use and a five year shelf life - Fits: Smith & Wesson K, L, and N-Frame Revolvers... - Round or square-butt frames: Models 10 thru 29, 48, 53, 56, 57, 58, 64 thru 68, 242, 329, 396, 520, 547, 581, 586, 610, 617, 624, 625, 627, 629, 648, 657, 686 and 696. * Will not fit K-Frame Scandium revolvers. Manufactures Website Address www.crimsontrace.com Warranty Information