Db Augmented Major 7th, 3rd inversion (B# in the bass)
Also written as Dbaug(maj7)/B#.
Notes, from the bass up
B# (bass)C#E#A
The same notes as Db Augmented Major 7th (B#, C#, E# and A), rearranged so B# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.