The AMP-4004 four channel amplifier can increase the CCTV video transmission range of your surveillance system up to 1000 meters over RG59 coaxial cable.  This amplifier has four (4) channel video amplifier provides 4 BNC video inputs and 4 BNC video outputs. The AMP-4004 is typically positioned near your CCTV DVR where BNC video jumper cables can be used to connect the output of the amplifier to the camera inputs of DVR unit.  Each of the 4 video inputs can be connected to a CCTV camera located up to approximately 3000 feet (1000 meters) away from the DVR.  The AMP-4004 has individual sharpness and brightness adjustments so each camera can work perfectly with your DVR.