TMEZON 7 Inch TFT Color Display Wired Video Doorphone Doorbell Intercom System Night Vision 1V1 1200TVL HD Home House Security TMEZON 4-Wire Villa visual intercom system 7 inch color LCD indoor monitor built with easy operating system,slim design and fashionable Touch button. Outdoor doorbell with 1200TVL camera, 100 degree wide view angle,High definition,Night vision,Rainproof and Anti-vandal design. Doorbell can connect the all electronic lock. Automatically Snapshot or RecordWhen visitor press the doorbell or triggered motion detection,the camera will automatically snapshot or recording and save in the additional Micro SD card. You can easily record who was at your door and improve your home security. (SD card need to purchase separately,built-in memory can save about 80 pictures.) Multiple Intercom for 1 Family HouseConnect up to 4x monitors+ 2x doorbell cameras. Dual-Way communication between monitor and camera,monitor and monitor; support call transfer among all the monitors. You can answer the door and unlock via all indoor monitors,it is convenient and widely used in apartments, villas, hotels Multi-device interconnectionSupport connect with additional 2x CCTV camera,2x PIR alarms,2x electronic locks, giving you more comprehensive protection for your home. About the extension wireThe extension wire is not included in the box,but we will provide the 4 pin connector for you connect the extension wires.You can use RVV4(4 core wire)/Cat5/Cat6 wires to extend the distance for monitor to doorbell, monitor to monitor according to your need, maximum distance 100-200 meters.