The WE TECH 882 holographic Sight is the larger version enables use of full size batteries.
it comes with a red or green reticule with various levels of brightness.
Sight can be adjusted for windage & elevation.
Sight is supplied with batteries, a cover and QD mount option.
This optic will fit all standard dovetail type rails.
As with all clone optics the batteries supplied can be of variable quality so you may want/need to replace with new ones from the start.