This 1 to 37inch Color LCD Video Intercom Doorbell with CMOS color camera is response monitor function, easy operation, when someone press the doorbell button, you just need press "monitor” then you can monitor the outside door and press "Unlock", the electric door will automatically open without any action. Phone intercom system will be a good doorman! Hands free operation of the LCD Intercom Doorbell allows you to see and hear who is at your entrance before deciding whether or not you want to answer. Intercom Doorbell new trend lead the world, embodies the high-end luxury. Our Intercom Doorbell adopts high-definition CCD camera, which makes a better effect for image.
Other Thoughts:Upgraded to this Intercom Doorbell and have been very happy. First, it now sets in the middle of the house . Second, the volume is loud enough that it can be heard from the entire house.