Bcomtech Video Intercom System for Home with Front Back Doorbell Camera and 2 Indoor Monitor 7 Inch For Room Apartment Support Extension Monitor CCTV/Doorbell Camera Design advantage: Elegant design, ultra-slim monitor, touch sensor button. Metal outdoor doorbell camera. Fashion blue and red light, visible during night. Main Function 1: Photo/Video Record, playback,32GB SD Card Support(Not Included).Built-in memory could save 80 pictures. Main Function 2: Dual-way intercom, video and audio chat; Call transfer among indoor monitors; professional and advanced audio chip MC3418. Main Function 3:HD Monitoring and Day/Night View; 800*480 high resolution monitor,800TVL doorbell camera; 3PCS 850nm IR LEDSs offer day night vision.Main Function 4: Various setting. Monitor volume setting from mute and up to level 10(3 modeRest/work/jollification mode),adjustable chroma and brightness ring volume. 12 kinds of ring tones. There is two pieces 5 meter extension cable for monitor and doorbell, one piece 5 meter extension cable for monitor and monitor in the package.