The EXPS3 offers true 2 eyes open shooting and a 7 mm raised base that still allows for 1/3 iron sight co-witness. It features easy-to-adjust side buttons and an adjustable, locking, quick-detach lever for easy attachment and removal. It's night vision-compatibility makes it a versatile choice for day or night hunting. Night vision-compatibility makes it a versatile choice for day or night hunting. Night vision capable for Gen I-III+ devices. Features Auto Shut Down at 8 hours.