There is a rectangular type shape, but the left and right sides of it both curve in to the right going the same direction. In the middle of the shape is the letters R and T.
This Xbox Rt icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.