1.     All-metal shell with rain cover, vandal-proof and water-proof, durable, can

2.     surface-mounted or be fixed on column

3.     Single-button panel, realizes full-duplex intercom.

4.     Built-in Speaker, microphone and camera.

5.     Digital audio and video recording, can save the audio and video files in SD card

6.     while talking and being uploaded to the server in spare time.

7.     Audio output interface, can work with active speaker or earphones.

8.     Short-circuit output and input interfaces, can receive and control some peripheral devices.

9.     Works everywhere as long as Ethernet is available.