A Proximity 125Khz LF Thin Cards With Number is a “contactless” smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and “contact” type smart cards. The proximity cards are part of the contactless card technologies. Held near an electronic reader for a moment they enable the identification of an encoded number. The reader usually produces a beep or other sound to indicate the card has been read.
Proximity 125Khz LF Thin Cards comes in two variants Without Number & With Number Printed on Smart Cards. You can ask for your requirements.