This is a pre-owned, fully tested 315 MHz OEM immobilizer and one pre-paired Porsche OEM fob, ready to use out-of the box  It comes with the 4-digit PIN code you can use to program additional fobs - either Porsche OEM or our upgraded F1 fobs.  Note that Immobilizers available on EBAY rarely come with the PIN or a programmed fob, making them an expensive paperweight.  This immobilizer has also had upgraded receiver capacitors installed that restore the full factory-specified range and reliable communications.