The Superbikero is essentially a pair of gigantic slap-bracelets, one of which has a flip-up mirror on it. They're meant for cyclists to wear, with the mirror providing rear visibility and both bracelets serving as turn signals that can be seen when you extend your arms.
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I know wrist-mounted bike mirrors have been around for a while (maybe not with the blinkers), but I don't think I've ever seen one on a cyclist during my years in the city. Experienced cyclists among you: Yea or nay? Have you ever worn one of these, and if so were you able to get a consistent view out of it, or does it depend on your handlebar configuration?