""With the same rugged precision as the legendary Trijicon ACOG, the Trijicon 4x32 Battery ACOG delivers robust engineering and enhanced user control. Powered by a single AA battery, the electronics offer an outstanding level of reliability with a straightforward brightness dial, allowing the operator to determine how much to illuminate the reticle-even in transitional lighting. The body has been optimized by moving the RMR mount forward to maximize its performance in conjunction with the ACOG. Fully night vision device compatible, the Trijicon 4x32 Battery ACOG is also compatible with most other 4x32 ACOG accessories available. This product also includes:- 1 Thumbscrew Flattop Adapter- 1 AA Battery- 1 Lens Pen- 1 Lanyard Assembly for Adjuster Caps- 1 Lanyard Assembly for Battery Cap- 1 Trijicon Logo Sticker- 1 Manual- 1 Warranty Card Specifications:- Magnification: 4x- Objective Size: 32mm- Bullet Drop Compensator: Yes- Length: 6.0"- Weight: 18.1 oz. with TA51 Mount and Alkaline Battery- Illumination Source: LED- Reticle Pattern: Horseshoe Dot- Day Reticle Color: Green- Night Reticle Color: Green- Calibration: 0.223- Bindon Aiming Concept: Yes- Eye Relief: 1.5"- Exit Pupil: 8mm- Field of View (Degrees): 7- Field of View at 100 yards (ft): 36.8- Adjustment at 100 yards (clicks/in): 2- Mount Comes With: TA51- Housing Material: Forged Aluminum- Batteries: Single AA Lithium or Alkaline Battery- Battery Life: Over 12,000 hours on setting #4 using supplied alkaline battery at 21C (70F)""