Viiko Red Laser Beam Dot Sight Scope Rifles Pistols Lazer Laser Handguns Picatinny Mount

Battery Installment Instructions: The batteries for your laser sight types is LR44/AG13 ,you will need 3 of them to work, Make sure the labeled side of the batteries are all facing out. Place your batteries ONE BY ONE to make sure not any of them fliped to wrong side during installment. Product specification: Operation Switch:Button switch Total Weight: 60g Output Power: < 5mw Wavelength: 635-655nm Laser Range:approx.330ft/100m at night Laser Class:IIIA Batteries: 3 x 1.5v AG13 Batteries 1 x Compact Red beam laser sight 2 x wrench Warranty:6 month.