The SCS-MOS (Solar Charging Sight) is a direct attachment optic for full-size GLOCK(TM) MOS systems offering the lowest profile deck height for use with standard-height iron sights. The SCS-MOS combines solar power, rechargeable power storage, an auto-adjusting reticle brightness system with override function to potentially operate indefinitely in multiple lighting conditions. Multiple Reticle System (MRs): 2 MOA Dot Only, 32MOA Circle Only 2 MOA Dot with 32 MOA Circle Self Adjusting Brightness Control with Override Function Direct Attachment to Glock(TM) MOS system Parallax-free & Unlimited Eye Relief Internal Battery Level Indicator Grade 5 Titanium Housing Super Green LED In the Box Mounting Screws User Manual Lens Cloth Multi Tool