Tactical Internal Laser Targeting Systems for Glock handguns. All internal installation. Pistol retains its original factory footprint. 50 mW laser available in red, green, blue or infrared. Visible in direct sunlight and over 1000 yards at night. Automatic activation using a proximity detector embedded within the trigger guard. Rechargeable Li-Ion battery via a micro USB port.. 250 hours of standby time with two hours of lasing time. Two hour recharge time. Adjustable laser output power (5mW to 50mW). Available for all Glocks -- Full size,Compact, Sub-compact and Slimline (G42,G43) (less)