·All metal shell explosion-proof and waterproof, sturdy and durable, can be installed openly and fixed on vertical poles ·Single key call (designated call destination on the server) to achieve full duplex intercom ·Built in speaker for hands-free communication and broadcast reception ·Built in microphone for two-way intercom function, capable of monitoring terminals ·Optional built-in camera for monitoring function (TB-8202 model) ·Digital recording and video recording function, audio files recorded during intercom are saved on the SD card and uploaded when idle ·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 ·It can be accessed from anywhere with Ethernet, across network segments and routers