In my part of Europe, half of the major retail chains have had this for quite a few years. I actually didn't realise what it was until one day I went in and it

In my part of Europe, half of the major retail chains have had this for quite a few years. I actually didn't realise what it was until one day I went in and it was broken, as all the price labels were flickering. The price displays use black and red eink displays in a plastic frame.