Eyes See Green Better. The RFX 15 is designed from the ground up to ensure clarity, solid function, and rapid target acquisition. With 2 night vision brightness settings, the RFX15 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 Dot17x24 mm Viewing WindowShield Footprint & Picatinny Mount IncludedAuto Shut Off and INSTANT-ON Technology8 Visible & 2 Night Vision Brightness Settings