HXVB-140R is 4 channel active UTP video balun receiver which mainly used for security, education and other fields. It uses Cat5 or Cat5e as a transmission medium. It can real-time transmit 1800 meters color or 2400 meters black and white baseband video signal if working with active receivers. and it can real-time transmit 1200 meters color or 1800 meters black and white baseband video signal if working with passive transceiver. it will save wiring costs, simplify your wiring works For more details on product, Please refer to http://www.papyrus.co.il/4activeutpvideobalunreceiver.htm