TMEZON Smart and Innovative IP video intercom system
Multiple Intercom Up to 2 doorbells can be connected with 4 indoor monitors.(The slave monitor is another model:MZ-VDP-739EM).
Dual-Way Communication between indoor monitor and outdoor camera; Call Transfer among monitors. You don't always go downstairs open the door after install the multiple intercom.
Phone is the Key:
If you forgot your key when closed your door, use your phone to unlock. See, hear and speak to people(like courier) as if you are home, never miss any visitor.It is convenient for elder or people with reduced mobility to open the door.