Check out TAG Heuer's latest tech Mikrotimer watch which is capable of measuring up to 1/1000th of a second. To do this, the watch's caliber run at 500 rotations per second, or 500Hz. In other words, and the Mikrotimer runs at 3.6 million beats per hour.

You can see in the video below, when operating as a stopwatch the sweep hand is moving so fast you can barely see it in motion.

[via Oh Gizmo]