It is round with two half circles on both sides of the top. The bottom has legs and there is a line pointing at noon and 9 pm.
This Alarm Clock 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 5,500 icons, all in the same style and quality.