Idea of Slider Icon
This icon consists of three horizontal bars, each one with a circular slider on it. The indication is this icon would take you to a menu which would allow you to change various options b adjusting sliders like this.
This Slider 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 6,200 icons, all in the same style and quality.