1、7 inch digital color LCD screen, no radiation and low power consumption, true high definition 16:9 widescreen display. 2、Ultra-thin design, aluminum panel, electroplated keys, high-grade beauty all show luxury style. 3、With Speakerphone function. 4、Active monitoring of outdoor functions. 5、The brightness, color and volume of the image can be adjusted synchronously at will. Apartment 2 units independent 7 inch color LCD Intercom doorbell, two households independent, separate video, talk to each other, unlock. Features: Indoor monitor: 7 inch digital color LCD screen, no radiation and low power consumption, true high definition 16:9 widescreen display. Ultra-thin design, aluminum panel, electroplated keys, high-grade beauty all show luxury style. With Speakerphone function. Active monitoring of outdoor functions. The brightness, color and volume of the image can be adjusted synchronously at will. One-key unlock function. Outdoor unit: Electronic control unlock function (open the lock with power on, and use the special access control power supply if the lock is opened without power). All metal waterproof and explosion-proof. Two separate buttons Night vision function, 6 night vision infrared lights. Intercom function between indoor monitor and outdoor unit Specification: Plug type: AU plug Display resolution: 840*480 System: PAL /NTSC (alternative); Power supply mode: switch power supply ac110-240v 50Hz/DC15V 2A; Current: less than 800mA; Call delay time: 120S±10%; Monitoring delay time:60S±10%; Camera sensor: hd color CMOS; 700 line Outdoor infrared night vision function: low open 10LUX infrared open; Indoor monitor installation: wall-mounted; Outdoor monitor installation: wall-mounted; Connecting wire: standard 5-meter 4-core connecting wire + 15cm 2-core terminal wire (connected with electronic control lock); Effective distance: can be connected to 200 meters of cable, image, intercom work normally; Indoor machine: 180*120*18mm/7.1*4.7*0.7in Outdoor:180*90*20mm/7.1*3.5*0.8in Weight: Approx.1953g/68.9oz Package list: 1 * outdoor unit 2 * indoor monitor 2 * power supply 2 * 5m quad conductor 1 * 2 core interface wire 2 * set mounting screws 1 * English manual 4 * quad port line