Wife lost auxiliary key, 2008 cx9 with credit card smart key system? how much?

Hey guys, i have 2 smart keys with aux keys. Wife lost her aux key, so now i just have 2smart cards and one aux key. I ordered 2 chinese blanks, but they are just physical keys. Do the factory aux keys have electronics? There isn't much information on this exactly. I thought the aux key was purely physical just in case the smart key system failed so it wouldn't require any electronics.
 
Yes, as I have replied you thru message.
There is RFID inside the head. You need to program it into the ECU to turn the cylinder.
The cylinder senses the RFID and allow it to turn and start the engine.
 
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