This one is actually powered by RF transfer, so the power is all external. This link explains it better: http://www.youtube.com/watch?v=d6g581tJ7bM#t=10m15s ht

This one is actually powered by RF transfer, so the power is all external. This link explains it better: http://www.youtube.com/watch?v=d6g581tJ7bM#t=10m15s http://www.youtube.com/watch?v=d6g581tJ7bM#t=10m15s