The インスタ 人気投稿 アルゴリズム Awards: The Best, Worst, and Weirdest Things We've Seen
http://andyldbt333.iamarrows.com/10-signs-you-should-invest-in-insuta-ren-qi-tou-gao
Even cables with constructed-in repeaters normally enable for an external power provide for being connected. This really is just a little more security for the signal and may be a good idea based on the problem