VSS2364 Monochrome Quad Observation System Real Time Quad mode, I.e. the pictures from the connected cameras are displayed in a 2x2 format These quad pictures can also be recorded, thus no chance of loosing info as with switcher In case of alarm or when doorbell used Stores 4 sec. before and after the event from the specific camera (16 images) and replays them continuously picture in picture   VSS2360 Monochrome Observation System Connection of max. 4 cameras, with camera cable length 300m (600 with option) Manual selection of cameras for viewing, or Automatic sequential switching, with dwell time adjustable between 4-60 seconds Output/Input for VCR