How are LED car rims powered?

Greetings,

Anyone know how power is supplied to spinning car rims?

http://customwheel.com/custom_wheels/product_info.php/products_id/1687

Thanks

caitlinsdad7 years ago
http://www.wheels2000.com/PimpStar-Technical.html
NeuroPulse (author)  caitlinsdad7 years ago
Great! Thanks! Those were the rims I had found, but I did not find the tech info.

So the device used to make an electrical connection through a rotating assembly is called a "slip ring".

http://en.wikipedia.org/wiki/Slip_ring
My other guess would have been some induction coupled device like those new mat chargers for cellphones.
...not that I have them on the minivan. $20K for a set.