This is the logo for the B button on an XBox controller. It has a capital letter "B" inside of a circle which resembles the button found on all XBox controllers.
This Xbox B icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 6,000 icons, all in the same style and quality.