The RFX 45 is packed with industry-leading features while offering a tremendous value to the shooter. A rock-solid machined 6061 aluminum housing, fully multi coated lenses, audible and tactile adjustability, INSTANT-ON activation w/ memory and auto shut off and a 50k hour battery life are just a few of the features that make the RFX 45 a must-have for any shooter.Features :Footprint: ACROLens Dimension: 24mm x 15.5mmEye Relief: UnlimitedLens Coating: Fully Multi Coated GlassMaximum Adjustment: 90 MOAReticle: 5 MOA GreenPower Source: 1 x CR2032Battery Life: Up to 50k hours