How do I tell if I have a transponder key or not?

I want to get one of those Jeep Rock keys and need to know if I have one or not.

 

those are the keys that have the built in lock unlock buttons im pretty sure

 

If it's a gray oval key head, it's a transponder key. This type of key has to be coded to start the engine.

It is possible to code the key yourself if you already have 2 keys and are making a 3rd. Basically you buy a blank key, get it cut (cheap) and then go through the process of coding it. If you need more help I will make a writeup of how to do it.

 

I don't think I have a transponder key then. I have the black keys with the little key fob remote switch.