The Fast Up Button emoji is used to speed up a video or some music. Don’t confuse this with the fast forward option since this speeds up the sound instead of the image. If you enjoy listening to high pitch songs or videos, than this is the button for you.
The fast up button emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols
category. Because the fast up button emoji has been around for quite some time, it should display correctly in the majority of operating systems.