The ROMEO4XT-PRO offers the same high-end optical performance, quad-reticle, and legendary durability of the original ROMEO4T while adding key features requested by professionals.  Illumination control moves to the top, providing easy access with either hand while staying clear of chest rigs and plate carriers when slung. A dedicated night vision override switch makes short work of drastic changes in lighting conditions and by combining MOTAC with a common AAA battery, the ROMEO4XT-PRO is rated for 50,000 hours of runtime.  Like its predecessor, the ROMEO4XT-PRO is IPX8-rated for waterproof and fog proof performance and is tested to MIL-STD-810 to ensure reliable service. Specifications for SIG SAUER Romeo 4XT-PRO 1x20mm Red Dot Sight: Manufacturer: SIG SAUER Magnification: 1 x Objective Lens Diameter: 20 mm Reticle: Ballistic Circle Dot Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Type: MOA Adjustment Click Value: 0.5 MOA Emitter Type: Enclosed Battery Type: AAA Battery Quantity: 1 Battery Life: 50,000 hours Gun Make: SIG Sauer Weight: 7.4 oz Condition: New Red Dot Sights-Footprint: Not Applicable Attachment Type: Screw Adjustment Range: 0.5 MOA Overall Length: 177 mm Features of SIG SAUER Romeo 4XT-PRO 1x20mm Red Dot Sight Top mounted activation with NV override control, 50, 000hr runtime, 3 mounting heights come standard in box. Package Contents: SIG SAUER Romeo 4XT-PRO 1x20mm Red Dot Sight 3 mounting heights clear flip-backs opaque front flip back and ARD kill-flash.