Calibrated for crossbows that shoot in the 300 fps range, this 20, 30, and 40-yard combo illuminated dot and crosshair configuration is housed in a lightweight 7" aluminum tube equipped with fully coated 3x optics. The dots are positioned at the intersection of each duplex crosshair. Depending on your hunting conditions, you can choose from a non-illuminated black dot or one of two illuminated, colored dots (red or green). A five-position rheostat controls the light intensity and color.