The F sharp suspended fourth seventh chord is a 4-note chord consisting of the notes F#, B, C# and E.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as F#7sus4.
Chords that are a superset of F#7sus4. The chords include more notes but always F#, B, C# and E.
Chords that are a subset of F#7sus4. These contain less notes but all of them are included in F#7sus4.
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 F#7sus4 chord. Feel free to save or share the image as needed.