The transponder is inserted in the vehicle key in the form of a computer chip. Many modern vehicles feature keys that have a keyless entry, where the ignition key sticks out of a large, square case. In that case it is the chip, usually no larger than the tip of a finger, that allows the driver access to the vehicle.
An eBill (electronic bill) is an electronic version of a paper bill that you can view and pay online. Instead of being sent to your home mailbox, eBills are delivered to the websites of companies who you do business with. This could be your bank, credit union, or any company that sends you bills (cable, phone, power, credit card and so on).
AT&T eBill allows you to view, save, print, and pay your bill online using your credit/debit card, checking, or savings account. You will have secure, 24/7 access to your account from any Internet connection and you can choose to stop receiving your AT&T paper bills through the U.S. mail. You'll enjoy the added benefit of viewing up to 36 months of billing history. Pay, print, sort, and graph your bill for easy analyzing.