It's a picture of a shower head with black dots underneath it. Right under the head part there are 3 black dots and then underneath that is 4 black dots and underneath that is 5 black dots making it look like water coming ou like a shower is on.
This is the Shower icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.