Colorado Time Systems R-1004-0506 Dolphin Wireless Stopwatch - Dolphin provides wireless swimming stopwatch-style timing for swimming competitions. It significantly reduces the amount of effort required to run a meet and manage data. By transferring all timing data wirelessly, the system has improved accuracy compared to manual swimming stopwatches. This stopwatch has three modes of operation: semi-automatic timing, manual synchronized start/manual stop and manual start/manual stop.