Features: 2-MOA Red Dot for precise aiming 22mm multi-coated objective lens Digital push-button brightness controls 10 brightness settings Remembers last used brightness settings when powering on Includes low and high Picatinny / Weaver rail mounts for maximum compatibility Locking windage and elevation adjustments Wide field of view CNC-machined from aircraft-grade aluminum Unlimited eye relief Auto-off feature preserves battery life (4-hour idle from last button push) Nitrogen gas-filled Rubber lens cover included Battery included (1.5V AAA)