It is made by metal. It’s square and usually in a big box to protect from raining or water. Its color is silver and it has numbers from 0 to 9 on the face, and there are red and blue buttons beside the numbers.

 It used to be very popular, but these days, it is considered as old-fashion stuff. Even though it is found easily on the street, it is hard to see that it is used by someone. To use it, you can use a coin or a card.