iPod shuffle (1st generation)

No screen at all. Apple shipped a 512MB flash player the size and roughly the shape of a pack of chewing gum, with a control ring on the front, a lanyard loop, and a USB plug under the cap so it needed no cable. The pitch was that you should not need to choose. Autofill put a random selection from your library on it and you pressed play, which turned a limitation into the product. It cost $99 for 512MB and $149 for 1GB, undercutting every flash player worth owning, and Apple sold an enormous number to people who wanted something to run with. The slogan was that life is random, and it is one of the few pieces of Apple marketing that described the actual experience of using the thing.