This Unknown Status icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,300 icons, all in the same style and quality.
It's a logo of a circle in the middle and then on the right and left two smaller circles on each side in a straight line and on top and bottom one smaller circle in a straight line to form sort of an equal sideways cross look to it.
Related to Unknown Status Icon
Related icons are the icons with matching tags, as well as all messaging icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors