The Trac Trigger Firing System (TTFS) back and forth and an internal clutch eliminates over-cocking, allowing cocking and uncocking to be stopped or resumed at any time during the process. A proprietary system rotates cams 360 degrees. A built-in trigger mechanism that slides forward on the rail and clasps directly to the precise center of the string. This technology allows the arrow and string to free float above the rail, eliminating friction for consistent accuracy and increased string and cable life. The cocking mechanism allows you to stop the draw cycle at any time during the cocking process. New scope with added Speed Lock ring secure your fps dial after sighting in. The Power stroke is 15" @ 500 fps and 7.75" axle - axle with a draw force of 17 lbs.