The Record Button emoji is a solid coloured circle. If you’re a musical person, whether expert or beginner, than you recognize this button. Before you’d start recording that song that will make you famous, you’d hit this button.
The record button emoji was introduced in 2014 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols
category. Because the record button emoji has been around for quite some time, it should display correctly in the majority of operating systems.