This is an interesting idea. It allows you to use a typewriter as a keyboard. It is actually a USB typewriter conversion kit that allows users to type on their computer using an old typewriter keyboard. Quite why someone would want to do this, I don’t know but if it is for you you can buy them at Etsy.com. They sell for between $699 and $899 depending on the model you choose and you can also buy a do it yourself kit for $74.