intercom system

Intercom system,Video door phone Indoor phone V-12 Functions:
SMT with high integration and strong stability
Handsfree, intercom, monitor, unlock, and call guard unit (optional)
11 melodies for ring selection
Password, avoid-disturbed, and alarm functions
4 or 7 alarm zones to connect with different detectors (for security indoor phone)
It may connect with doorbell, arm/disarm switch (for security indoor phone)
Arm or disarm the alarm zones by card or password (for security indoor phone)
Accepted to connect with extension indoor phones
To connect multi-functional module will be with storage more than 100pcs pictures and message broadcasting functions (optional)
Technical parameter:
Display: 4-inch CRT, 4-inch TFT
Scan frequency: 15.625kHz/50Hz
Resolution: 400TVL
Video input: 1Vp-p/75 ohms
Audio S/N:

Intercom system Indoor phone V-12;CE and ROSH certificate,color display.