Apartment 3 Units Wired Video Door Phone Audio Visual Doorbell Intercom Entry System Features: Indoor Unit: 7 inch color digital LCD screen, no radiation, low power consumption, really high definition 16:9 widescreen display. Ultra-thin design indoor unit, acrylic panel, high-grade and beautiful to present luxurious style. Hands-free intercom function, active outdoor monitoring function, one-button unlock function. 16 music ringtones are available, pleasant to your ears, eliminating the annoyance of constantly hearing monotonous ringtone. The image brightness, chroma and volume of the indoor unit are simultaneously adjustable. Outdoor Unit: Electronically controlled unlock function, power-on unlock and power-off unlock require a special access control power supply. All metal waterproof, explosion-proof, with 6 night vision infrared lights for IR night vision function. Two discrete buttons, intercom calling function of indoor unit and outdoor unit. Specification: Condition: Material: ABS + PMMA panel Color: shown as picture Display resolution: 840*480 Whole unit current: < 800mA Call delay time: 120S ± 10% Monitoring delay time: 60S±10% Camera sensor: HD color CMOS; 700 lines Outdoor unit infrared night vision function: less than 10LUX infrared on Indoor unit size: approx.24*15*2cm/9.4*5.9*0.8in Outdoor unit size: approx.18*9*2cm/7.1*3.5*0.8in Indoor unit installation method: wall-mounted Outdoor unit installation method: wall-mounted Connection cable: 4-core connection cable standard 5m + 4-core terminal cable 15cm (connected to electric control lock) Package List: 3 * Indoor Unit (7 inch color LCD screen display) 1 * Outdoor Unit (Camera) 3 * Connection Cable (Standard 5m) 3 * Switch Power 3 * Screw Bag 1 * User Manual