Through the screen installed at a corridor door, visitors can use software to talk to the hosts via mobile phone or landline. Even if they are not at home, hosts can also open the door for visitors.
楼道门口安装的显示屏，通过APP软件接通家庭成员的手机或固定电话，即便不在家，也可与来访者可视对讲，或者为来者开门。
Through the screen installed at a corridor door, visitors can use software to talk to the hosts via mobile phone or landline. Even if they are not at home, hosts can also open the door for visitors.
楼道门口安装的显示屏，通过APP软件接通家庭成员的手机或固定电话，即便不在家，也可与来访者可视对讲，或者为来者开门。
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