This is a Time Limit icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,800 icons, all in the same style and quality.
There is a circle. In the circle, there are dots. The dots surround the inside of the circle. There is the number 48 in the center of the circle. In the top left of the circle, there is an arrow pointed left and down.