The EOTech XPS3 is smaller and lighter than all other holographic weapon sights but just as fast. Law enforcement officers and hunters appreciate the light weight and compact size for carrying convenience on the job and in the woods. The XPS3 runs on a single 123 battery. The single-lithium-battery configuration allows more rail space, leaving more room for rear-iron sights, magnifiers, or a night vision mount. IncludedHWS XPS3Quick-Start GuideWarranty CardCR123 BatteryProtective Case Features20 daylight settings10 additional settings for Gen I through III+ night vision devicesBattery life up to 1,000 continuous hours at nominal setting 12Parallax Free