Db 13sus4, 3rd inversion (B in the bass)
Also written as Db13sus4/B.
Notes, from the bass up
B (bass)D#A#C#F#G#
The same notes as Db 13sus4 (B, D#, A#, C#, F# and G#), rearranged so B is the lowest note. Use it to move between chords with smaller jumps across the keyboard.