The VISM SPD Solar Powered Combat Red Dot optic is a compact red dot optic packed with many desirable features. The small tube optic includes these features: dual power source from solar cells to power the red dot reticle from the Sun or a single AAA battery, electronic control panel, and our Patented Switch Cover that rotates and folds flat against the optic body with a push of a button. Flexible and multiple mounting options: includes a low rail mount and a quick release higher 1.5″ mount height (for AR15/ M4 absolute ironsight co-witness) that will mount to nearly any Weaver/ Picatinny/ MIL-STD1913 type rails.