Eotech 553 Military Model Holographic Sight Eotech 553 Military Model sight with standard 2D reticle pattern, ARMS throw levers and 123 battery power is one of newest sights from Eotech. The design improvment were in response to Military specification that include the height being raised 7mm to provide a consistent cheek weld with all other standardized optics. The Eotech 553 has been is now submersible to a 66 ft. depth. Along with this design imrovement, the rubber control pad has been redesigned to improve the feel of the push button switches. The switches are designed with raised inlays to provide further separation between switch controls and reduce audible signature. Features Reticle Pattern: 2D Length/Width/Height: 4.9” x 1.8” x 2.8” Weight: 12.3 oz Waterproof: Submersible to 66 ft depth Color/Finish: Black Mount: Picatinny (MIL-STD-1913) with dual ARMS® throw lever system. Return to Zero: Repeatable to 1 MOA after re-mounting Night Vision Contrast Ratio: 1,280:1 with NV switch engaged. Power Source: 2 x Lithium 123 batteries Battery Life: 1100 continuous hours at nominal setting 12. Compatible with GenI - III+ Night Vision Systems (tandem operation) 7mm raised base to provide an operator a consistent cheek weld with all other standardized optics. 66 feet water submersibility. Battery cap tether to avoid loss in the field.