The EXPS3 offers true 2 eyes open shooting and a 7 mm raised base that still allows for 13 iron sight cowitness. It features easytoadjust side buttons and an adjustable locking quickdetach lever for easy attachment and removal. Its night visioncompatibility makes it a versatile choice for day or night hunting. Night visioncompatibility makes it a versatile choice for day or night hunting. Night vision capable for Gen IIII devices. Features Auto Shut Down at 8 hours.