If you have aspirations of taking on the tournament scene, the SteelSeries Sentry, a device that tracks how your eyes monitor your computer screen, may be able to teach you some good habits. SteelSeries announced the Sentry just in time for E3 2014, and while Tom’s Guide saw the device, we did not get a chance to go hands-on (or perhaps more accurately, eyes-on). What we can say about the device is that it is a rectangular bar, a little more than a foot long, that rests beneath a computer monitor at a slight upward angle.