The Vortex Optics Defender-ST Tan Enclosed Solar Micro Green Dot Sight is a durable multi-platform optic featuring a rugged 7075 aluminum housing designed for duty, competition, and tactical applications. Equipped with Auto D-TEC technology, it combines an integrated solar panel with a side-loading CR2032 battery to achieve up to 150,000 hours of dual-power runtime. Vortex Optics Defender ST Tan Enclosed Solar Micro Green Dot Sight w/3 MOA Dot & 32 MOA Circle, Motion Activated, DeltaPoint Pro Mount DFST-MGD3-E