单片机系统（控制）、矩阵键盘、LED显示和拨号报警系统（四部分）组成，能完成开锁、超时报警、拨号远程报警、超次锁定、管理员解密、修改用户密码基本的密码锁的功能-The system is composed by the monolithic integrated circuit system, the matrix keyboard, the LED demonstration and the digit dialing alarm system .it has functions of com