The Shadow-Zone has the same basic design features as our famous Vari-Zone PLUS a dual color illuminated multiplex reticle 2-4X32mm, making it a must for hunting in the low light conditions. Like the Vari-Zone, the Shadow-Zone features Excalibur"s adjustable multiplex crosshair system that makes it possible to adjust crosshair spacing for precisely 10 yard increments to match the exact trajectory of your crossbow at velocities between 250 and 350 FPS.