This sight uses state of the art technology to offer one of the most advanced sighting systems on the planet harnessing the suns energy to power the internal and ever lasing solar capacitance system that holds a charge much longer and for many more years than a battery powered systems. Features: 8 reticle brightness settings Electronic switch button Wide field of view Low power consumption. Clocking Wind age/Elevation adjustment method Compatible with magnifiers or NVGS Mounting Whilst in Quick Detach (QD) dovetail base version, please use QD shaft for adjustment and the rail needs to be as parallel as possible to the grooves of the weaver-style base. Loosen the shaft will set the base to stretch while tighten the shaft to end will make the base fixed. To change the shaft tension, loosen the shaft, clock wisely rotate the bolt of shaft link will increase tension and counter-clock wisely rotate will decrease tension. Make sure the dot sight is fully seated onto the base and carefully tighten the mounting screws. For additional security, a drop of thread-locking fluid can be added to the screws. Technical Specifications: Reticle color Red/Green/Red Green Reticle brightness 1-5 and off Magnification 1xObjective lens size 39x27mmEye relief unlimited Parallax ≤3'Wind age/elevation Range 30'Adjustment method Clocking Adjustment 1 material aluminum Mount type Weaver/pica tinny Operation temperature -20℃ ~ 60℃Dimensions 108x53x62mm.