The NcSTAR VAPRLSMBLV2 compact blue laser sight combines adjustable aiming capability with selectable strobe functionality for compatible pistol rails.Its 450nm Class IIIa laser outputs less than 5mW and mounts to most Weaver, Picatinny, MIL-STD 1913, and pistol accessory-spec rails. Side buttons operate power; press and hold to toggle strobe mode.Fully adjustable blue laserBlack anodized aluminum housingRed LED low-battery indicatorDimensions: 2.0L x 1.1W x 1.1H; weight: 1.8 oz. with batteriesUses two CR1/3N batteries; included except with international ordersIts lightweight, compact construction keeps controls accessible while providing adjustable blue-laser functionality and strobe selection on supported accessory rails.