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Yahoo CEO Marissa Mayer is said to have joined the board of directors of gadget maker Jawbone. According to AllThingsD, sources familiar with the matter said that Mayer has been familiar with Jawbone for some time and has already sat in on one of the company's board meetings.

Jawbone is a San Francisco-based company has been making colorful tech gadgets for more than a decade, such as the Jambox wireless speaker and the Jawbone Up fitness bracelet that tracks users' physical activity and syncs the data to mobile devices.

The fact that many of Jawbones devices focus on wireless technology and syncing to mobile devices is fitting -- given that one of Mayer's objectives for Yahoo is to place mobile at the center of her product strategy.

Yahoo has 200 million unique monthly users on mobile devices, Mayer said in January. She also predicted, at the time, that Yahoo will be one of -- if not the -- predominant platforms in the mobile era.

According to AllThingsD, Mayer is also on the board of Walmart Stores and a handful of cultural institutions in San Francisco and New York.

CNET contacted Yahoo and Jawbone for comment. We'll update the story when we get more information.