The EXPS3 is an excellent choice not only for hunters, but for professionals too. The EXPS3 offers true two eyes open shooting for fast target acquisition, night vision-compatible settings, and a 7 mm raised base for lower iron sight access. It also has side buttons and an adjustable, locking, quick-detach lever for easy installation and removal. Specifications: Dimension: 3.8" X 2.3" X 2.9" Weight: 11.2 oz Water Resistant: 33ft (10m) Color: BLACK Mount: Quick Detach lever fits both 1" Weaver and Mil-STD -1913 Rail Brightness: 30 settings (10 for night vision) Power Source: 1-123 lithium battery Battery Life: 1000 continuous hours at nominal setting 12 Reticle: 68 MOA ring with (2) 1 MOA dots Night Vision Compatible: YES.