Now I've got the nike+iPod sproets kit, here is the picture of the box outside.
(I can't find a retailer here that has a sports kit in there stores, so I got it on the webstore.)

You can see that it's from singapore.(Tell me if I'm wrong.)
here is the picture of the box inside.

I've tried it and uploaded my scores.
It's great with the iPod nano(it's great with others too), I ran 2km(s) and walked for 4km(s).
I didn't thought I could run for 2km(s).(I don't usually run.)
I'm not sure if it's accurate or not, but it will make me run once a week.
ps: I'm not an native English speaker, I apologize for grammar mistakes.