... wiring distance: 50m/165 feet (22AWG, 0.65mm 4 wire) Wiring: 4 wires Communications ways: Synchronous Communications Scene illumination: 0. ... : 55º Angular adjust: Left: 13º, Right: 13º, Up: 4º, Down: 4º Ambient humidity: 45% - 95% Ambient temperature: -10°C±40 ... 3.5'' and 4'' color TFT LCD Surface mounting installation Calling, intercom Watching door entrance Pressing button, opening the door Plastic ...