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)