This Boombox 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.
There is a rectangle with curved edges and a curved top. There are small curved rectangles inside the first rectangle which are the speakers for the boombox. The first, larger rectangle has a handle coming out of the top.