Specifically designed for pistol applications, the Holosun® HE508T-GR X2 Green Dot Open Reflex Sight – Titanium features a durable titanium housing, engineered for superior shock and corrosion resistance, while the streamlined design offers an exceptionally smooth draw and holstering. The versatile Multi-Reticle System allows you to choose your favored reticle (2 MOA dot or 32 MOA circle) for enhanced clarity, and 12 brightness settings (10 daylight; 2 night vision) deliver exceptional clarity in any lighting. Multilayer reflective glass lenses deflect stray light away from your eye for exceptional clarity and reduced eye fatigue. Shake Awake™ technology automatically activates the red dot when motion is detected, and automatically powers down the unit when the weapon is idle for an extended period of time for superior battery conservation. Solar Failsafe™ technology utilizes the sun’s energy to power the unit in daylight environments, conserving battery life for overcast or dark environments. Operating on a single CR1632 battery, this reflex sight boasts an impressive 50,000-hour battery life (lowest setting). IP67 waterproof.