Model 552 is in use by military forces and government agencies like the DEA, ATF and FBI. It's night vision-compatible. Are you a sportsman interested in hunting with night vision? Give the 552 another look. The 552 is EOTech's most affordable night vision-compatible sight and it partners with most night vision-devices. The 552 is designed to increase your speed to target even after the sun goes down. Length/Width/Height: 5.6 x 2 x 2.5 (143 x 51 x 64 mm) Weight: 11.1oz (312 g) Water Resistant: Submersible to 33 ft. (10 m) depth Mount: 1 Weaver or MIL-STD-1913 rail Brightness: 20 daylight settings 10 additional settings for Gen I through III+ night vision devices Power Source: Two 1.5 V AA batteries Supports lithium, alkaline, or rechargeable Battery Life: Lithium: 1,000 continuous hours at nominal setting 12 at room temp. AA alkaline: 600 continuous hours at nominal setting 12 at room temp.