The HS510C Open Reflex Circle Dot Sight has an open titanium frame for a wide sight picture. 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, a 2 MOA dot only, or a 65 MOA ring only at the push of a button. The green LED projects both reticles, so no re-zeroing is necessary and allows up to 50,000 hours of operation on a CR2032 battery (included). It features 10 DL and 2 NV Compatible Brightness settings, has a shake awake sensor, quick detachable mount and has a IP67 waterproof rating.