E add2/A#
The E add2 chord consists of the E (Perfect unison), F# (Major second), G# (Major third) and B (Perfect fifth) notes, with A# as the bass note.

How to play the E add2/A# chord
- Play A# as the lowest bass note in the left hand
- Find E (Root) on the piano keyboard
- Add F# (Major second) — 2 semitones above E
- Add G# (Major third) — 4 semitones above E
- Add B (Perfect fifth) — 7 semitones above E
- Press all 5 notes simultaneously to sound the E add2/A# chord