A wider and wider adoption of remote keyless entry and immobilizer systems, which let drivers access, start, and secure their cars without removing a key fob from pocket or purse, is being taking place. Expanded applications using wireless RFID technology (for low current draw on a fob's battery) are being developed to link key fobs with smart phones and other personal electronics.
Future functions could then include GPS-based location of one's car in a parking lot and use of the key to pay parking fees or even retail purchases.
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