1. 具有密码输入，密码清除，能上锁，开锁，还有密码修改的功能。

2. 密码输入三次错误能自锁，报警的功能。要求上锁，开锁，报警都用发光二极管显示。

3. 输入的数据能够在数码管上显示。

-1. With a password, password clear, can lock, unlock, as well as the password change function. 2. Wrong password three times to self-locking and alarm functions. Requested lock, unlock, alarm all with a light-emitting diode display. 3. Input data can be displayed on the digital control.