The AMERIGLO Haven is for defending your family and your home requires 24/7 reliability, immediate target acquisition and intuitive controls. The HAVEN is guaranteed to survive continuous firing and recoil from todays harshest handguns and is compatible with todays most common IWB/OWB holsters. Ready for immediate install on todays most popular optics-ready pistols, the HAVEN uses the Trijicon RMR footprint. Its smart electronics offer a 12hr runtime followed by a 12hr motion-activated auto-on. With a two year battery life on a mid-setting. Includes CR2032 battery (installed), optic fasteners, T10/T6 Torx tool, quick reference guide and an AMERIGLO sticker.