Truglo's OPTI-Speed Crossbow Scope allows you to take advantage of the speed and power of modern crossbows with a powerful optic. It features a drop-compensating reticle to provide accurate hold-overs from 20-70 yards and calibrates to any speed of crossbow by scaling the reticle with a simple dial. The glass-etched reticle can be used with or without illumination, depending on surrounding light and target color. The scope body is waterproof, fog-proof, and nitrogen gas-filled while the fully-coated lenses provide maximum brightness, clarity, and contrast. The OPTI-Speed also has an adjustable brightness control, wide field of view, and a .50 MOA. Included are 30mm Weaver-style rings and a 3V CR2032 battery. This model has a black finish and a illuminated BCD reticle.