A circular apparatus, formerly clean, polished metal and glass. You can see out from inside.
There is a panel with several buttons:
|-------|
| [[
2]] |
| [[
A]] |
| [[
1]] |
| [[
U]] |
| [[
B]]#|
|-------|
To the right of the "B" button is a keyhole.
You check your
pocket to see if you have a key.