Item Dimensions The HS403C is a 20 mm micro optic sight designed for rifle and carbine applications. Features include Solar Failsafe, 12 brightness settings, Holosun’s Red Super LED with up to 50k hours of battery life, and a 2 MOA dot. In the Box Lower 1/3 mount Low profile mount L-shaped T10 wrench Rubber cover User manual CR2032 battery Lens cloth OPTICAL DATA Reticle 2 MOA Light wavelength 650nm Reticle color Red Parallax-free Yes Unlimited eye relief Yes Magnification 1x Multi-coated Yes ELECTRONIC DATA Power source Solar and battery Battery type CR2032 Battery life (hours) 50000 Brightness settings 10 DL and 2 NV PHYSICAL DATA Window size 20 mm diameter Dimensions (inches) 2.45 × 1.43 × 1.6 Weight (oz) 2.82 MECHANICAL DATA Housing material 6061 T6 aluminum Surface finish MAO Adjustment per click 0.5 MOA W&E travel range ±50 MOA ENVIRONMENTAL DATA Storage temperature -40 ℃ ~ 70 ℃ Operating temperature -30 ℃ ~ 60 ℃ Submersion IP67 Vibration 1000G