THIS DEVICE IS CONNECTED TO THE CAMERA AND THE OTHER TO THE DVR AND WITH A SIMPLE AND ECONOMIC BIPOLAR CABLE YOU CAN BRING THE IMAGE FROM THE CAMERA TO THE DVR ON A DISTANCE UP TO 600 METERS

YOU WILL NOT HAVE A GREATER SIGNAL LOSS IN CARRYING VERY LONG BNC CABLES

This device is essential when the cable length of the cameras exceeds 50 meters. Over 50 meters the camera cannot transmit the video signal to the target device (monitor, DVR or other device). In fact it is a converter for transmitting the video signal of the wired cameras on a twisted cable up to a cable length of 400 meters. They are sold in pairs because one goes to one end of the cable and the other goes to the other end.