The RFX 11 is the next in a long line of purpose-built, high quality, and highly visible aiming devices from Viridian. Its tiny size is at home on any optics-cut concealed carry pistol or as a close-range offset sight on your rifle. At a mere 4 ounces, the RFX 11 is one of the lightest reflex sights on the market. Packed with features including a highly visible and efficient Viridian green 3 MOA dot, INSTANT-ON and auto shut off, ambient light sensor and over 30k hours of run time make the RFX 11 a must have for any firearm. Footprint: Shield RMSc Dimensions: 1.6" x 0.95" x 0.89" Lens Dimension: 16mm x 22mm Eye Relief: Unlimited Lens Coating: Multi Coated Glass Maximum Adjustment: 90 MOA Reticle: 3 MOA Green Power Source: 1 x CR2032 Battery Life: 30,000 hours (middle setting) Settings: Automatic Brightness Control Operation: Instant-On with Ambient Light Sensor Dimensions: 1.6"(L) x 1.0"(W) x 0.9"(H) Weight: 0.44oz / 12.47 grams Housing Material: High Strength Thermomolded Polymer Environmental: IPX4 Operating Temperature: -4F to 130F Warranty: Limited Lifetime