Eyes See Green Better. The RFX 35 is designed from the ground up to ensure clarity, solid function, and rapid target acquisition. With 2 night vision brightness settings, the RFX35 is the perfect optic for your pistol in any light condition and is tested in the harshest conditions to ensure your optic will be ready whenever you need itFeatures :3 MOA Micro Green Dot22x26 mm Viewing WindowRMR Mounting Footprint & Picatinny Mount IncludedAuto Shut Off and INSTANT-ON Technology8 Visible & 2 Night Vision Brightness Settings