We are Grateful for YOU! This is an immobilizer transceiver for the 2006-2007 Dodge Magnum Charger with the part number 56040642AP. It comes with a key and is a direct replacement for your old one. It is compatible with other models such as the Chrysler 300 and does not require any universal fitment. The warranty is for 60 days or a lifetime with core exchange. This item is perfect for those looking for a reliable replacement without having to worry about compatibility issues.