1.   Plastic shell, desktop design, can be fixed on table or wall.

2.   Double call buttons, can call different goals (set in server), realize dull-duplex talkback.

3.   Built-in speaker and microphone, hands-free call and broadcasting receiving.

4.   Digital recording, upload to server automatically.

5.   With audio output interface, can connect to external speaker.

6.   Short-circuit output for connect electronic lock or alarm light, etc.

7.   Remote software update, configuration monitoring.

8.   Works everywhere as long as Ethernet is available.