I have to agree with Harry. It's not a good idea to use ANY eink device without a case/cover for it. I woudl never dream of taking my 505 anyplace without it's cover. I've never come close to scratching the screen. But I could if I didn't have the cover. And as Harry said, it's not scratches that is the problem. Te cover protects again some amount of pressure when you have the device in a carry bag for example.
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