It is sign of boarding location.
It hangs from the ceiling of bus terminal.
It's size is kind of middle
It looks like a little piece of cake.
Under part looks like pretty a thimble.
It has flat parts up and down.
I think It is kind of heavy.
It is shaped kind of trigonal prism with rounded angle.
It informs destination in 3 different language (Korea, English, Chinese)
and the number of boarding location.
It is made of plastic and iron.
It has white and navy blue colors.
It has red underline.