Each lock is packed with 1pcs Mater card and 3pcs blue keyfob user cards. Hotel IC Card Lock System. Basic needs of hotel lock system: 1, Lock: Choose the lock you prefer. 2, RF cards: T5577 card. 3, Card encoder: Used to issue room card with software. 4, Software: which will send with encoder for free. 5, Computer: Work on window XP, 7, 8, and 10.