Tactical Docter Red Dot Sight Compact Mini Reflex Sight Pistol Scope Auto Bright

- AUTO ON/OFF:ON - remove the sight cover, OFF - cover the sight - AUTO BRIGHTNESS CONTROL - Magnification: 1x - Tubeless Sight Window Lens Size: 21mmx15mm - Length: 45mm, Width: 28mm - Weight (net): 55g - Eye Relief: Free, excellent for moving target and raid shot - Field of View (@100yds): 6.2° - Optics Coating: Multi Coated - Reticle: Red dot - Parallax: 1'' at 50 yards - Elevation adjustment Range: ±360cm/100m - Windage adjustment Range: ±270cm/100m - Power supply: 3V CR2032 lithium cell battery - Shock proof, Rain Proof and Fog Proof - Lightweight & Compact Design - Integrated 21mm weaver mount - High quality aluminum alloy in durable black matte finish - Right and up screws are for the adjustment of windage and elevation. Loosen or Fasten the back tow screws before or after adjustment, which is for lock purpose. - To exchange the battery just use hex key to loosen the two allen screws. Take apart the scope from the weaver mount base. Take out the used battery, exchange with a new one and then assemble the scope.