F# Augmented Major 7th, 1st inversion (A# in the bass)
Also written as F#aug(maj7)/A#.
Notes, from the bass up
A# (bass)DE#F#
The same notes as F# Augmented Major 7th (A#, D, E# and F#), rearranged so A# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.