One of the most popular Holographic Weapon Sights on the market, the 552 is used by military forces and government agencies like the DEA, ATF & FBI. The model 552 is one of EOTech's most affordable night vision-compatible and works with most night vision-devices. It's proven to withstand abuse in harsh environments and the impact from high powered weapons, with 20 daylight settings and 10 additional settings for night vision-devices. The EOTech 552 uses two 1.5 v AA batteries which can be lithium, alkaline or recharable. The battery life is rated for 1,000 continuous hours for lithium and 600 continuous hours with a standard AA alkaline battery. The 552 is water resistant up to 33 feet (10m) and can mount on a 1" Weaver or 1" Picatnny MIL-STD-1913 rail.