These are self adhesive, white letter on transparent backing labels. The default labels you get are:
PIT DRS MENU ERS + ERS - TALK MODE VIEW MAP PL PC N EXIT MIX LIGHT + - WIPERS FUEL + FUEL - START ARC BIAS DAMAGE TEMP TC+ TC- ABS+ ABS- DIFF
If you wish to add any labels that are not included, please let me know in the checkout message box.
You do not need to purchase these labels if you get a themed F1 or GT edition, as they include a label set.
The labels can also be stuck onto the buttons but since all the stock Logitech buttons are domed, you will need to cut the label edging as closely as possible to avoid wrinkles.
Note: clean any surfaces with soapy water or rubbing alcohol, dry it and then apply the stickers.