contactless

contactless

[kon-takt-lis]
adjective
noting or pertaining to RFID technology or devices that use radio waves to relay identifying information to an electronic reader, so that the device does not need to be in direct contact with the reader: contactless credit and debit cards.

Origin:
contact + -less

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World English Dictionary
contactless (ˈkɒntæktlɪs)
 
adj
1.  without contacts
2.  referring to payment systems which use RFID technology and do not require the customer's signature or pin number

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