Transponder Keys Made Chicago
A transponder Key has an electronic transmitter embedded inside the key andit this chip sends a signal to your ignition indicating it is the right key for the car to open the doors or start.
Thes keys are not easy to copy or program. Very often this requires not only knowledge but also the right equipment to program the key with its unique and specific codes.
You also have to know how to cut the key which in most cases can only be done by vendors who are officially registered with the car manufacturers.