Pack of 100 MIFARE Classic® 1K NXP EV1 plastic cards. These contain a 4-byte UID number and operate at 13.56 MHZ frequency with 1K byte of memory. The bright white finish of the cards allows for outstanding customisation and branding possibilities. These plastic cards are manufactured to be ISO/IEC 14443 type A compliant. Life cycle 200,000 write cycles or 10 years.