Tactical RMR Red Dot Sight 3.25MOA Picatinny Mount Adjustable Reflex Sight,20mm Red Dot Sight Scope，Great for Handguns.

3.5MOA red dot and 1MOA/click windage and elevation adjustments with audible click (move the point of impact 1 inch at 100 yards), Simple 2-on operation: (+) and (-) ons are used to power the device up/down and increase/decrease the aiming point brightness level., Auto Off: The RDS is equipped with intelligent power management to prolong battery life when not in use. After a period of three hours of inactivity., Easy to install - intended for use on s equipped with Picatinny rails, Mini RMR Red Dot Sight Collimator Sight Scope fit 20mm Hunting Rifle/great for handguns. Non-magnifying red dot sight, easy to use for shooting, hunting, home defence.