The F augmented chord is a 3-note chord consisting of the notes F, A and C#.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Faug.
Chords that are a superset of Faug. The chords include more notes but always F, A and C#.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the Faug chord. Feel free to save or share the image as needed.