Bb sus2/F#
The Bb sus2 chord consists of the Bb (Perfect unison), C (Major second) and F (Perfect fifth) notes, with F# as the bass note.

How to play the Bb sus2/F# chord
- Play F# as the lowest bass note in the left hand
- Find Bb (Root) on the piano keyboard
- Add C (Major second) — 2 semitones above Bb
- Add F (Perfect fifth) — 7 semitones above Bb
- Press all 4 notes simultaneously to sound the Bb sus2/F# chord