The B9 sus 4 chord (B9 suspended 4, or A/B) contains the notes B, E, F#, A and C#. It can be thought of as a B9 chord with a 4th (instead of a 3rd) or a A chord with a B in the bass.

10 Ways To Play The B9 Sus 4 chord

If you’ve come to this page just to view some chord diagrams for B9 Sus 4 (G/A), here they are.

B9 Sus 4 Chord 10 Shapes