> Displayer: 3.5-inch STN screen
> Camera: 1.3 mega pixel camera
> Excellent night vision effect
> Aluminum die-casting construction plate
> Call indoor monitor and management centre
> Support contacts call function
> Support open with pass word and IC card
> Support unlock remotely
> Save visitor audio and video function
> Support extension A&C module
DH-VTO1220B (2014-02-28, English)
