7"Handfree Video Intercom with Telephone Function

Feature:
4 wires connection
Intercom function
Door monitoring function
Lock control
Call transfer to the other monitor
Internal-communication
Color Contrast, Brightness adjustment
DO NOT DISTURB setting
Visitor-call transfer
Indoor monitor listening function
Image format convert 16: 9 to 4: 3
Broadcast function
Image and video captured
Video door phone with DVR function
Answer machine function
Multimedia function
Call transfer to telephone