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.16 ringtones optional, beautiful sound.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 buttonsNight vision function, 6 night vision infrared lights.Intercom function between indoor monitor and outdoor unitSpecification:Voltage:100-240VPlug type: EU plugDisplay resolution: 840*480System: 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 lineOutdoor 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*0.7inOutdoor:180*90*20mm/7.1*3.5*0.8inWeight: Approx.1953g/68.9ozPackage list:1 * outdoor unit2 * indoor monitor2 * power supply2 * 5m quad conductor1 * 2 core interface wire2 * set mounting screws1 * English manual4 * quad port line