This Billboard 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 4,300 icons, all in the same style and quality.
The image is of a rectangle with the long sides horizontal. The rectangular part has three notches across the top. Below the rectangle, is a stand. The rectangle is sitting on the stand. There are connected.