Designed for luxury villas and residential use, this visual doorbell system offers seamless communication with visiting guests. When a visitor rings the doorbell outside, the indoor unit automatically displays a high-definition widescreen image. With the touch of a button, you can engage in a conversation with the visitor using the hands-free intercom feature. Pressing the unlock button activates the electric door lock, eliminating the need to physically open the door. In standby mode, you can also monitor the external surroundings by simply pressing the monitoring button 7-inch TFT LCD screen with no radiation, low power consumption, and high-definition widescreen imagery Hands-free intercom functionality for convenient communication Electric door unlocking capability for enhanced security and convenience Outdoor surveillance feature to monitor the outside area Adjustable image brightness, color, and volume to suit your preferences The outdoor unit is constructed from anti-oxidation and wear-resistant aluminum alloy Ultra-thin design for the indoor unit with an aluminum panel, electroplated buttons, and a luxurious appearance. Choose from 12 different chime options for a variety of doorbell sounds The compact and elegant outdoor unit is made from aluminum alloy, equipped with night vision infrared functionality, and designed for easy wall-mounted installation Specifications: Item number: 801FC21 Power supply: AC220V--50Hz DC15V 1.2A Whole machine current: less than 800mA Call delay time: 120S±10% Monitoring delay time: 60S±10% Camera sensor: OV1030 420 lines Lens: 3.6mm, 92 degrees Night vision: outdoor unit with infrared night vision function Indoor unit dimensions: (H)165x(W)235x(D)35mm Outdoor unit dimensions: (H)100x(W)35x(D)155mm Outdoor installation method: wall-mounted Connecting cable: 4-core cable (5 meters) Note: Does not include built-in rechargeable battery or memory card.