The RFX45 features a closed emitter design for a more robust design along with a 24x15.5mm rectangular window to offer a wider field of view. Viridian's signature green LED emitters provide a bright 5 MOA green dot praised for better visibility compared to traditional red dot emitters. The RFX45 sports 10 illumination settings (8 day/2 night) along with a 50,000 hour runtime on a single CR2032 battery. This model features an all-black finish and utilizes an Aimpoint ACRO footprint. One CR2032 battery is included along with a sight adjustment tool and an RMR adapter plate.