This Video Intercom Systme is a cable TV monitoring system. With the camera fixed in the outdoor section, you can watch over the conditions outside on screen inside the room. The dual-directional speaker system and indoor lock-control function guarantee a perfect duarding product. Even at pitch-dark night, infrared-photographing function can present you a complete image outside. The product has a clear display screen and a best-designed shapr, is practical, reliable, simple to install and easy to handle. We strongly recommend its use as burglarproof and monitoring system for family purpose. This unique system is a combination of a video camera and a door phone. By using this system, you can communicate with your visitors over the handset seeing who's at the door. With a auto IRIS Infra-red LED, you can enjoy constantly clean bright picture on the screen at any light level from 0.1 lux to 1000 lux. This system integrates with a 4" Monitor and a slim size camera (wide view angle 120 degree). Special Features: High Resolution Camera with Night Vision Easy Installaion Programmable Door opener Input Signal: Standard Video Signal, VS0.5-1.4 Vp-p Input Impedance: 75 ohm Picture Reproducibility: large or equal 90% Video Bandwidth: ~5.5 MHz Luminance Appraisal Grade: Grade 8 Picture Resolution: 380 TVL Illumination Source for Night Vision: Infrared Camera Angle: 92 degree Power Consumption: Standby4W; Operation15W On Jun 3, 2022 at 10:01:33 PDT, seller added the following information: