Amocam 7" LCD Monitor Wired Video Intercom Doorbell System for 4 Units Apartment Video Door Phone Bell Kits support Monitoring, Unlock, Dual-way Door Intercom IR Night Vision 1- Camera 4- screen 1pcs outdoor camera and 4pcs indoor monitor video intercom system, supporting 1 building which has 4 households. enable you see and hear to security monitors & displays. 7 Inch acrylic LCD touch key screen,door answering, monitoring and unlock, dual-way intercom Mute indoor intercom with door dell kits. 16 different kinds of door bells chimes.Volume, brightness and contrast are adjustable. Fashion and nice design,which can also be used a decoration of your house for home improvement. 700TVL CMOS IR night vision high resolution camera, easy to install,wired connection stability for home security systems. Can be used in apartments, villas, hotels, offices, public buildings.Support video intercom 12 monitors of security & surveillance equipment.