See and speak with the person at your entranceway and front door [& backdoor as well with an additional door camera] from the safety and comfort of your home or office without ever having to open your door to an unseen person.Perfect performance two way communication with hands free, large 7 color,screen and adjustable volume controls. You have a choice of being notified of a visitor's presence with 8 melodic chimes and you have an instant alarm for unwelcome intruders. Protect your family with this Home Video Intercom system with the convenience of electronic door unlock. This is a modern, attractive, wall mountable unit. more info