NC Star DX4BLQ Rogue Reflex Sight/Blue Reticles/QR Mount, Black LED (Light Emitting Diode) 100% safe for the eyes Heads up display Unlimited eye relief and field of view 4 different Rogue reticles to select from BLUE colored ROGUE reticle set: Evil Face, VISM, Spade and Grenade Unlimited Eye Relief for flexible mounting position on a firearm 24 X 34mm Objective lens offers a wide field of view