The E suspended fourth seventh chord is a 4-note chord consisting of the notes E, A, B and D.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as E7sus4.
Chords that are a superset of E7sus4. The chords include more notes but always E, A, B and D.
Chords that are a subset of E7sus4. These contain less notes but all of them are included in E7sus4.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the E7sus4 chord. Feel free to save or share the image as needed.