Default Phone Cover Hard Case With Wireless Charge Receiver For LG P990

I found this:

http://www.ebay.com/itm/Phone-Cover-...item2a30c11d8e

on Ebay.

It seems its a cover for QI charging for our good old phone...

But i am insecure. For what is the cable and the plug on the cover???

The pictures are not very helpfull... Or must i put the plug into the mico USB connector? If so.. this looks like a......