HT1338 why is my laptop shown as unknown when devices are listed in "find my mac"?

Among other devices, I purchased a MacAir laptop.  When I looked at the "find my iPhone and find my iMac" list recently, I noticed that the MacAir was listed as a unknown device. 
How do I change that status to reflect that it is Me?

The fingertips vibrating persistenyly would seem to rule this out but my experience with electricity with my MacBook and my MacBook Pro is the shocks are my fault, not the equipment. Static buildup, especially during winter, is to blame. When it's dry (like it is here right now) it's a lot worse, all I have to do is squirm a little on the couch to send tingles across my hands or generate a nice loud pop.
When I walk up to my MBP I've taken to the habit of pulling my MagSafe adapter by the cord and touching it's outer connector to discharge excess static before touching my kit. Though, as I'm sure someone will point out, there is probably a good explanation as to why this is a really stupid thing to do.

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