Double Arrow, Down
This is a "Quick Down" button, which is composed of two triangles with sharp corners pointing down at the same time. The triangles of most platforms are connected end to end or even overlap, showing black, white or gray; However, there is a certain gap between the two triangles of au by KDDI platform, which is purple. The appearance of triangles designed by different platforms is different, some are isosceles triangles and some are equilateral triangles; Some triangles have sharp three corners, while others appear smooth.
It should be noted that the background colors are different on different platforms. For example, Google platform depicts orange background color, Facebook platform displays gray background color, and Microsoft platform depicts dark blue background frame with black edge.
The "fast down button" is usually used to specifically slow down the playing speed of video or music.
