A# maj7/E
The A# maj7 chord consists of the A# (Perfect unison), D (Major third), F (Perfect fifth) and A (Major seventh) notes, with E as the bass note.

How to play the A# maj7/E chord
- Play E as the lowest bass note in the left hand
- Find A# (Root) on the piano keyboard
- Add D (Major third) — 4 semitones above A#
- Add F (Perfect fifth) — 7 semitones above A#
- Add A (Major seventh) — 11 semitones above A#
- Press all 5 notes simultaneously to sound the A# maj7/E chord