Not available for US customers. If you place an order containing any Holosun items to be shipped to the US, it will be cancelled and a 5% cancellation fee applied. The HS510C Open Reflex Circle Dot Sight has an open frame for a wide sight picture. Always on, it is powered by solar cell under normal usage, and a back-up battery to supplement power requirements in low light conditions. The reticle can be switched between a 65 MOA circle with 2 MOA dot, or a 2 MOA dot only at the push of a button. Better yet, the same LED projects both reticles, so no re-zeroing is necessary. Features Up to 50,000 hour battery life and Advanced Solar Fail Safe™ technology. Automatic reticle intensity adjustment in Solar Mode. 3 Reticle Options: 65MOA circle and dot, 2MOA dot only and 65MOA circle only Shake Awake™ - Motion on with last setting recall. Low battery warning. Parallax free, unlimited eye relief. IP67 Certified. Specifications CNC Milled 6061 Aluminum Housing with a Titanium hood. 0.5 MOA Windage & Elevation adjustments per click. 10 day light and 2 night vision compatible reticle brightness settings. Comes with a 1.41" QD mount. Window Size 0.91x1.2 inches (32mm x 24mm). SPECIFICATIONS MANUAL - English MANUAL - French