The maximum length of a passive DisplayPort cable is at least 15 meters/33 feet. Depending on the quality of the cable and other factors, you may be able to transmit video and audio over greater distances
If you need greater distance, you have two choices: a signal booster or an active cable. Both do essentially the same thing. They regenerate or increase the strength of the signal so it can be transmitted further. Depending on the resolution, active cables can easily reach 150-ft or more
OptoElectronics Display Port AOC cable can meet your demand for long-distance transmission.
Contact us for more details.