F sus4
The F sus4 chord consists of the F (Perfect unison), A# (Perfect fourth) and C (Perfect fifth) notes.

How to play the F sus4 chord
- Find F (Root) on the piano keyboard
- Add A# (Perfect fourth) — 5 semitones above F
- Add C (Perfect fifth) — 7 semitones above F
- Press all 3 notes simultaneously to sound the F sus4 chord