Functions：

1. Video intercom with outdoor station, and intercom with management center;

2. Total touch-screen;

3. Intercom between users;

4. Receive messages from management center（Support p2p and group sending）;

5. Support RS-485 interface（can extend "multi-meter remote direct-reading system"）;

6. Support 4 zones wired alarm（can extend to 8 zones）;

7. Support double-confirm doorbells;

8. Support electric-album（need insert into SD card）；

9. Support snapshot & auto-save;

10. Remote unlock the door;

11. Show time & date, network & SD card status;

12. Adjustable Volume;

13. Support multi-language（Simplified Chinese/ Traditional Chinese/ English）;

14. Support special password to change the parameters;

15. Support screen optimization;

16. Can monitor more than one door station;

17.  Remote update software & system maintain.