Armasight CO-Mini HD MG Gen 2+ Night Vision High Definition Clip-On System with Manual Gain Manual gain control Simple and quick conversion of daytime scope to night vision Mounts in front of any daytime scope with no rezeroing required Powered by a single alkaline 1.5V AA or 3V CR123A lithium battery Export Restriction By adding to cart I agree that I do not intend to export this product outside of the USA