> It's also shielded by plastic around the edges so you can't get to it with a more blunt object, such as your elbow. My guess is the idea is to protect the re

> It's also shielded by plastic around the edges so you can't get to it with a more blunt object, such as your elbow. My guess is the idea is to protect the relatively fragile button against blunt impacts, like vandals or bicycle crashes.