Excalibur's 2.5 power Vari-Zone multiplex crossbow scopes allow hunters to accurately compensate for the trajctory of today's hunting crossbows for up to fifty yards. Sighted at 20 yards on the crosshair, pointers for 30, 40, and 50 yards help hunters to get the most out of their crossbow, and horizontal indexes assist in leading walking game to 25 yards. Other features include an ultra wide field of view, superb optics for maximum light gathering and a matte finish to reduce glare. They are virtually parallax free at normal crossbow shooting ranges, and have sensible 1" clicks at thirty yards. Adjustable for all velocities from 250-350 fps.