1、7 Inch Color Screen: With 800 x 480P resolution, the indoor screen clearly display outdoor image and easy control of answering the phone, opening the door, monitoring functions, support 1‑3 meters distance infrared night vision. 2、Two Way Calls and Remote Unlock: Doorbell system allows you to see, hear, and speak with visitors when they press the outdoor camera button. The device also supports the connection to an electronic lock, enabling remotely control the unlocking of indoor units. 3、Stable Signal: The wired video intercom system has a stable wireless signal, strong penetration, eliminating the need for network cables or concerns about signal delays. 4、Waterproof Outdoor Unit: The weather resistant outdoor unit with a rainproof cover is oxidation and wear resistant, ensuring optimal performance in any weather. 5、Widely Used: Video intercom system with a stylish appearance, is suitable for apartments, villas, hotels, offices, public buildings, can decorate your house, office, company, etc Item Type: Wired Video Intercom System Material: ABS Indoor Screen Screen: 7 inch Digital Screen Resolution: 800*480 Installation: Wall mounted Call Delay: 120s+10s Monitoring Delay: 60s+10s Power Consumption: Standby 0.5W / Working 8W Connection: Four wire, Five core wire with Extension Outdoor Doorbell Power Supply: Provided by the Indoor Unit Lens: 3.6mm92° Resolution: 700 TVL Installation: Wall mounted Infrared LED: 4-5pcs Infrared Sensing: Light Sensor Power Consumption: Standby 0.5W / Working 12W Connection: Four wire 1 x Indoor Display Screen 1 x Outdoor Doorbell 2 x 4P Flat Cable 1 x 2P Flat Cable 1 x 4P Cable (White) 8 x Expansion Screw 8 x Silver Screws 1 x Black Screw 1 x Adapter 1 x User Manual