JXPARTS 1 Pair of 4CH Video + 1CH Data Digital Video Optical Fiber Media Converter Converters Transmitter Receiver 4V1D 4 Channel Video 1 Channel Data This is a pair of 4CH Optical Fiber Media Converter, it is 4CH Video+1CH RS485 reverse data signal transmission. It is with FC interface for the fiber transmission and it is Single Fiber. It works with Single Mode and Multi Mode cable, the transmission distance upto 20KM for Single Mode and 2KM for Multi Mode Ships from China, takes 7 to 15 days to arrive you. After shipment is made, Amazon may send an email saying it take 3 to 4 weeks to arrive you. Please disregard this time frame, it is a default time frame by Amazon for shipment from China. The actual delivery is 7 to 15 days, if you do not receive it within 15 days, please contact us for customer service. Please note that Paper manual is not included electronic manual can be provided