UUQ&reg; Tactical Holographic Red Green Reflex Scope Sight 4 Reticles Tubeless design with 33mm reflex lens aperture provides a wide field of view, suitable for rapid-firing or shooting of moving targets besides normal shooting Multi-Riticle (4 patterns) or Variable Dot (4 different sizes) are installed Parallax corrected and unlimited eye-reliefAllen head screw type windage and elevation click adjustments with locking screw Built-in mount (integrated rail) for standard bases, no need to rezero when remounting the dismounted sight Very light weight, shockproof.Low power consumption for long battery life.