扩展功能：1、密码输入出错能立即报警。2、能实现本机键盘开锁。
Expansion of functions: one, the password input error can be reported to the police. 2, can realize the local keyboard lock.
该系统实用性强、功能灵活多样，易于扩展，可广泛应用于家庭、办公室、仓库、金融单位等安全防盗报警。
With many functions, the system is very practical and can be easily extended. It is best for guarding against theft in private houses, offices, storehouses, financial institutions, etc.
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