This is a next generation wireless 5.8GHz receiver.  It has 4 video outputs that provide video for 4 video signals from 4 different wireless cameras.  As a result you can view and record 4 wireless cameras at the same time.  You can also connect the 4 video outputs to a quad processor to have a quad view on the monitor.  The 4 omni directional antennas ensure minimum signal interference and results in a clean crisp picture quality.