Is there a charge for visual doorbell?

Charge. Visual doorbell is not mandatory, but as a functional supporting facility, which is the basic function of the house. There is no agreement that the developer will install it for free. Property companies can recommend owners to install and negotiate fees. Visual intercom system is a set of modern well-off residential service measures, which provides two-way visual communication between visitors and residents, and realizes double recognition of images and sounds, thus increasing safety and reliability, saving a lot of time and improving work efficiency.