I have one extra SCT XCAL2 that has a "Unused' status and 3 changes left, meaning I returned the stock tunes back onto the car that this device was tied to and this device can now hold new tunes for 3 more cars. This device doesn't come with any tunes so you will still need to obtain a tune file somewhere or bring this device with you when you go get a custom tune. $250 shipped to you if you are in the US.