Crossbow Optimizer Speed Dial Adjustable Sighting System. Amazingly Simple 2 Bolt Instalation. Lightweight Durability CNC Machined Aluminum just 7oz. 48 Different Computer Designed Yardage Tapes Included for Bow Speeds of 260 to 410fps!The item "HHA Sports Optimizer Speed Dial Crossbow Sight System OL-SD #04002" is in sale since Sunday, February 16, 2020. This item is in the category "Sporting Goods\Outdoor Sports\Archery\Accessories\Sights". The seller is "archeryelements" and is located in Green Bay, Wisconsin. This item can be shipped worldwide.