Installation of inercom and videophone

The rapid development of technology has allowed us to no longer need to open the door when someone visits us. Often appear on the door nuisance seller, which would you prefer before slamming the door. Because of all these evils are you ready to jump to your assistance with:

• Entrance telephone, which communicate via headset with the main entrance and through the open door locks power
• Videophone, which also allows speech at production photos on the indoor unit.