Meet the new Barska 1x 20mm HQ Red Dot Gun Sight, a versatile gun sight designed for split-second targeting and well equipped for any situation. An innovative auto-brightness setting allows the gun sight to automatically adjust the red dot brightness to better match the current lighting environment. Also included with the gun sight is a precision quick-release mount that will maintain a zero setting shot after shot. The sight's high quality red dot uses AAA battery, and has external adjustments perfect for close to mid range shooting.