Bcomtech 7 Inch Colorful LCD Screen Intercom Video Doorbell Video Door Phone 1 Camera 3 Monitors Photo/Video Record and Playback HD 1200TVL IP65 1/3 CMOS Rainproof, anti-oxidation, durable metal outdoor camera HD 1200TVL IR Camera with Night Vision function, Pinhole,capture images in low-illumination environment 90 degree wide angle,Surface Mount Indoor Monitor 7" LCD Large Screen,Acrylic wire drawing shell,polyphonic melodies, ring volume, talking volume, chroma and brightness adjustable,Built-in Memory can save 80 pictures, support max.32G SD Card(Not Included) Video and Audio Chat, Dual-way intercom,Adjust Lock Time,Compatible with all electronic lock.3 mode sound volumn(Rest/work/jollification mode), There is a flexible option of setting the volume from mute and up to 10, making it convenient for night time. The easy-to-install unit is designed to be easy to expand. Connect up to 4 indoor video units with 2 outdoor video doorbell and 2 CCTV cameras kits to expand your coverage of entry points. It also could compatible with alarm There is one piece 5 meter extension cable for monitor and doorbell, two pieces 5 meter extension cable for monitor and monitor in the package.