Outdoor unit Main functions: 1. Calling guard room, resident or management center 2. Support password and ic card unlocking, can add the user card directly 3. Support the management center unlocking 4. Support remote monitoring 5. Message leaving 6. Support alarm unlocking in an emergency (for example, if you are hijacked to unlock the door, input the password in flashback way, then the management center will receive the alarm, and know you are hijacked.) 7. Anti-dismantle 8. Picture recording 9. With wrong operating voice prompt 10. Real time display 11. Can link to the elevator 12. Support body sensor to start to broadcast advertisement by divided period ( optional) Indoor unit Main functions: Video intercom, support intercom between apartments Support remote unlock Can call the management center Can monitor the outdoor unit, door station unit and ip camera (rtsp protocol) Alarm zone setting and disarming: one button for setting and disarming (can set 8 alarm zones arbitrarily) Monitoring, picture capturing and message leaving Recording function: alarm recording, visit recording, message recording and public information can be checked by indoor unit Real-time clock Can link to the elevator Smart home function: six modes, include control the air-conditioning, lamp, curtain, etc.(pending) Tcp ip 7 inch color video door phone system/ ip intercomtcp ip 7 inch color video door phone system/ ip intercomtcp ip 7 inch color video door phone system/ ip intercom