TenPoint Crossbow RangeMaster Pro Scope features a variable speed and arrow drop-compensation setting for crossbows that shoot between 275 and 365 FPS, the RangeMaster Pro Scope requires no adjustment for distance. The configuration consists of three duplex crosshairs and four dots calibrated for 20, 30, 40, and 50-yards. The fourth dot is free standing, situated just below the 40-yard crosshair. This 8.25-inch aluminum scope features a 30mm tube for heightened light-gathering and durability. It is equipped with an etched glass reticle and fully multi-coated 1.5 to 5x optics that reduce the loss of light transmission. Choose from a non-illuminated black dot or one of two illuminated, colored dots (red or green).