B m7
The B m7 chord consists of the B (Perfect unison), D (Minor third), F# (Perfect fifth) and A (Minor seventh) notes.

How to play the B m7 chord
- Find B (Root) on the piano keyboard
- Add D (Minor third) — 3 semitones above B
- Add F# (Perfect fifth) — 7 semitones above B
- Add A (Minor seventh) — 10 semitones above B
- Press all 4 notes simultaneously to sound the B m7 chord