What kind of device is it?
The device is a speaker.
     src        edge_attr  dst
0      0  to the right of   11
1      0  to the right of   17
2      0  to the right of    4
3      0  to the right of   15
4      0   to the left of   12
..   ...              ...  ...
154   27  to the right of   23
155   27  to the right of   20
156   27  to the right of   26
157   27   to the left of   16
158   27   to the left of   24

[159 rows x 3 columns]