Sling TV is offering three free hours of the first round of March Madness for computers owners who use the Google Chrome browser.

The first round of the annual college basketball tournament begins today, and millions of Americans are expected to follow along at home and at work.

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Sling hopes to capture part of the audience with the free preview which will likely have particular appeal to fans who want to get a quick update while at work today and tomorrow.

To take advantage of the preview, fans can visit on their desktop Google Chrome browser between today and tomorrow. After entering an e-mail address and password, they will be able to watch three hours of any Sling TV channel for free.

Sling, the live streaming service owned by Dish, carries TBS, TNT and truTV, all of which will show first round games during the next two days.  However, Sling does not have a carriage deal with CBS, which will air the remainder of the first round games.

While the three hours may not be enough for some fans, Sling also offers a 7-day free trial. So, once the three hours are done, they could enter their credit card information and sign up for seven more days of action. (The 7-day trial is available on all Sling-supported devices, including the Roku and Amazon Fire TV.)

The free, three-hour preview, and 7-day free trial, are only available to new customers.

— Phillip Swann