The design also has the function of showing, warning and choosing the controlled state.
同时此设计还具有显示，报警，控制状态选择等一些辅助功能。
The system realizes the function of display, inter_conversation, unlocking and warning. It is valuable.
系统实现了显示、对讲、开锁、报警等功能，具有实用价值。
The system realizes the function of display, inter_conversation, unlocking and warning. It is valuable.
系统实现了显示、对讲、开锁、报警等功能，具有实用价值。
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