Meet the ArenaGear Sports Timer RM-510: a two-gate timer for track & field events and NFL combine drills. It works with iPhone and Android devices, so you can see your time on mobile devices within 200ft.
The RM 510 sports timer uses 4 tripods and can send data to an unlimited number of phones. You also get 2 gates. You can use this timer for sprints, 20 to 400-yard dashes, and other comparable events.