The Ugly Truth About 유튜브 동영상 홍보
https://www.evernote.com/shard/s599/sh/55c50619-db06-a815-9618-c572ff0269d0/d8d299531222ce321fa8b576c014e62c
Commonly, signal boosters and repeaters will need an exterior power supply to spice up the signal, but thanks to its structure, HDMI can in fact be prolonged with out an external power source.