4 inches 4 Wires B/W Video Door Phone for Villa

Features1. Converse with visitors and unlock the door remotely 2. Visitors are visualable during communication and ringing. 3. Be able to monitor entranceway actively. 4. Be able to extend for one more wired camera 5. Adjustable contrast of the monitor 6. Adjustable volume of the ringing,call signal sound with electronic Chime(DingDong) 7. 4 inches B/W Flat CRT screen 8. Argent Cover 9. AutoShutDowntime:45seconds10. Installation method: placed flat or Wall-Hung typeSpecificationsMonitorType: Handfree/Handle Power Supply: DC13.5V+0.5Power Consumption: Maximum12W, standby0.5WAmbient Temperature: 0°C To 50°CAmbient Humidity: 45%-95%SNR: > 45dBDisplay: 4 inches B/W Flat CRT screen Call Signal Sound : Electronic Chime(DingDong)Picture Element: Horizontal 350 Lines, Vertical 380 Lines Maximum Wire Length From Camera: 30 meters using 0.65mm Cable Maximum Number monitor per System: 4 monitor Per Camera Installation: Surface-mount/ Inlay-inDimension and weight: 235mm X 143mm X 55mm 0.92kgOutdoor UnitSilver metal outdoor with rain cover & prevent splashingPower Supply: DC 12V 0.5APower Consumption: Maximum 2.5W, stand by: 0.1WAmbient Temperature: -10°C to 50°CAmbient Humidity: 45%-95%SNR: > 45dBCMOS: 380 lines resolutionMinimum illumination: 0.5 luxCamera: F:1.8,F+3.1m/mInstallation method: Wall-Hung or Inlay-in typeDimension and weight: 125mm X 90mm X 70mm 0.30 kgIncluding in one kit: one indoor monitor, one outdoor station, one adapter, one English user manual and one cable.