I learned about this yesterday while discussing another project with them. Those are the "media legends from the Spacesaver M" and they can put them on any key (except black.)
I ordered some in Red and Pebble and they shipped out bright and early today. I'll post photos when they arrive.
Code Product Quantity
PRK Single Unit Key - Buckling Spring - printed 1
Color: 50
Characters: Mute legend from the Spacesaver M
PRK Single Unit Key - Buckling Spring - printed 1
Color: 50
Characters: Volume Up legend from the Spacesaver M
PRK Single Unit Key - Buckling Spring - printed 1
Color: 50
Characters: Volume Down legend from the Spacesaver M
PRK Single Unit Key - Buckling Spring - printed 1
Color: RD
Characters: Mute legend from the Spacesaver M
PRK Single Unit Key - Buckling Spring - printed 1
Color: RD
Characters: Volume Up legend from the Spacesaver M
PRK Single Unit Key - Buckling Spring - printed 1
Color: RD
Characters: Volume Down legend from the Spacesaver M
The order seemed too small, so I went ahead and added another dozen keycaps or so -- just because...
- Ron | samwisekoi