'Contactless' payment allows a customer to pay without having to swipe their credit card. These contactless readers are common at gas stations and 7-11 stores. You'll have to have an American Express Expresspay, Discover Network, MasterCard PayPass™ or Visa Contactless card or device embedded with a chip that communicates with the reader via radio frequency.
“Guests no longer need to fumble for cash and coins, swipe a card or sign a receipt. Since they activate the transaction themselves by holding their cards 1 to 2 inches from the contactless reader, they can keep control of their cards while our cashiers can focus on providing great guest service," said Michael Verdesca, director of point-of-sale systems for Jack in the Box Inc.
All of Jack's contactless readers should all be installed by the end of the year.
more on contactless payments at wikipedia.