If you buy from this place, the key you receive is ready to go (it's programmed and starts the car). I know because I purchased one from them last month. They send it to a Chrysler dealer in PA that programs it for your car. Note what they require to prove that you own the car. I sent everything via email. I think that it took two weeks to get the new key. I highly recommend them.
Chrysler Crossfire Switchblade Remote Key