RF filtering ,- effective and inexpensive

Hello these filters I have found connected to the RJ45 connectors from router, to computer or streamer 
very effective lay uncle is a digital engineer and proved their worth on a scope ,and in practice removes 
noise that can correct the very sensitive digital signals for $50 an easy recommendation ,use two
https://www.dxengineering.com/parts/dxe-iso-plus-2