1. 6 apartments outdoor unit 2. with 7" V7D indoor monitor Multi apartments Video intercom system Model No#:SMT-520C-6(V7D)New bule, red, white 7 inch LCD TFT One camera to 6 monitors Feature:1) New blue, with, red 7" high resolution color TFT LCD panel display, with high resolution and highcontrast ratio2) One camera to 2-6monitors, the intercom can be shared between the monitors and the camera3 ...