Used in producing a double sided or a single Braille
Index Basic-D V5 Embosser is a great product that has been selling for years now. It has a very compact size, it supports over a hundred characters per second, printing can be done from a portable device. The cool thing about this product is that it uses a fan folded paper to produce a double sided or a single Braille.
https://store.humanware.com/hus/index-basic-d-v5-embosser.html