Crimson Trace LG-499G LaserGuard fits Heckler & Koch (H&K) VP9, VP40 & VP9SK. Features include the following. Green Laser Sight – can be seen during daylight hours more readily than red laser sight. Instinctive Activation – Front – (turns on when gripped). Battery life is 2 hours. Free batteries for life from Crimson Trace. 3 Year guarantee from Crimson Trace. Factory adjusted for 50 feet from factory. User adjustable windage & elevation. Get your Crimson Trace laser today!