Compact Pistol Blue Laser with StrobeButton on each side of laser body allows the user to turn On/Off laser and when pressed and held down turns the Strobe feature On/OFF.Mounts onto most Weaver / Picatinny / MIL-STD 1913/ Pistol accessory spec railsFully adjustable Blue Laser: 450nm, Max output Features a low battery condition with a Red LED on the side of the Laser body.Dimensions: 2.0L x 1.1W x 1.1HWeight: 1.8 oz. with BatteriesBlack Anodized Aluminum bodyUses 2 each CR1/3 N Batteries (Included) International orders will not include batteries.etail