The HDTools™ DOF4 Tx/Rx extension system offers reliable extension of uncompressed HD video and analog stereo audio to distances up to 5000 ft. (1,530 meters) over multimode fiber. The DOF4 Tx/Rx can be used for simple point-to-point applications, or in combination with HDTools™ distribution amplifiers and switchers to deliver a flexible, seamless solution for long distance signal transmission.