Brand: AIM Sports
This round insert is designed specifically to fit into a rubber button cover on an AiM PDM keypad (Part Nos. MC-KEY08 or MC-KEY12, sold separately). The back of the insert has a flat tab which fits into the cross-shaped slot on the keypad button. Sold individually.
This "GO/Horn" insert has a black background with one horizontal line, the word "GO" above it, and the international "horn" icon (a pictogram of a bugle) below it.