G# Minor 9b5, 1st inversion (B in the bass)
Also written as G#m9b5/B.
Notes, from the bass up
B (bass)DF#A#G#
The same notes as G# Minor 9b5 (B, D, F#, A# and G#), rearranged so B is the lowest note. Use it to move between chords with smaller jumps across the keyboard.