·High end aluminum alloy brushed panel, sturdy and durable, can be installed openly or embedded; ·Double key panel, with two modes of emergency call and alarm, can specify the target microphone or software to be called by the call key through software; ·Built in speaker, capable of hands-free calling and receiving broadcasts; ·Built in microphone head, capable of direct two-way communication and can be monitored; ·When the device is idle, background music can be played, and it will automatically interrupt during intercom; ·Equipped with an audio output port, it can be connected to an external active speaker; ·Equipped with short-circuit input and output ports, it can receive and control some peripheral devices (such as installing alarm lights); ·Where there is Ethernet, it can be accessed across network segments, routes, and the Internet. ·Call forwarding, when the paging microphone of the call is busy, can transfer the call to the higher-level center of the microphone;