1.IC Card can realize the independent locking for hotel or families. 2.Cards can be made without computer: the lock is equipped with the whole set system for making cards and canceling electric keys, which is very convenient for operation. 3.Realizing the parent-card management: use the parent card to add or delete the electric keys. 4.Dealing with lost electric key: you can cancel the lost key in the lock directly, which means the lost key is null.200 electric keys can be made for one single lock. 5.Door-unlock-warning: this can warn the user and ensure 100% security.New-type lock barrel with smaller.