Old video surveillance systems used to require a remote access system, a camera multiplexer, a time-lapse VCR and an unlimited supply of videotapes for remote viewing and digitally storing video from a multi-camera system. Now you can get the capabilities of all those products in one with this 4 Channel Network Digital Video Recorder (NDVR). Simply connect up to four surveillance cameras, sold separately, and you will be able to view activity on your property using a connected TV or display; the image can even be viewed remotely over the internet. Keep an eye on every angle of your home or business and record everything to the 160GB internal Hard Drive. Recording can be activated via a set schedule and even triggered by motion. Four sensor inputs have also been built-in that can activate an audible alarm or connect directly to your security system, all parts sold separately. PC Viewer software has been included for viewing your recorded video, taking a snapshot of the video and converting files to .AVI video format on your PC. This DVR packs in everything needed to digitally record, view and manage the video feed from your surveillance cameras whether you are at home, at work or on vacation.Other Features # There are four BNC connectors (VIDEO-IN) as 4 channels (CH1, CH2, CH3, and CH4) can be connect to four cameras # Video outputs include S-VIDEO, VIDEO-OUT and VGA-OUT for video display connection (TV, Monitor or LCD monitor) as needed # Backup data with a USB memory stick, or via a USB connection to your computer using the USB connector on the rear panel. # Easy-to-use VCR-style buttons on the front panel # On screen display menu # Quad or Multiplex mode recording # Auto detecting video signal loss # Auto detecting of HDD failure # Set the camera's mode as NTSC or PAL on the rear panel