guitar chord
B♭7sus4
A dominant seventh with the fourth standing in for the third.
Written the other way round it is A♯7sus4 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
666866
moderate · barre
x11141
moderate · barre
686866
moderate · barre
66686x
moderate · barre
x13141
moderate · barre
What is true of it
B♭7sus4 is B♭, E♭, F and A♭ — 1, 4, 5 and b7 counted from B♭.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 666866: 2 fingers, one of them barring the 6th fret, held at the 6th fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
Where its notes are on the neck
The brass dots are B♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
B♭7sus4/E♭
x66866
B♭7sus4/F
1111xx
B♭7sus4/A♭
xx6866
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.