Noise Filter Cable Ring, VSKEY [10 pcs] Anti-Interference Noise Filters Ferrite Core Choke Clip for Telephones,Tvs,Speakers,Video,Radio,Audio Equipment & Appliances Power Audio (10pcs 13.0mm)

Functioned, kept noise level to a minimal, small enough to fit in dash, and good price.

They did absolutely nothing to cancel the noise from my beamtech bulbs. 2 broke while installing them. I would not recommend them for noise canceling pertaining to automotive led bulbs

Item came in really quick. No idea if there is an improvement. Still have a bit of static, but that be because I didn't solder connections.

Amazing! I really had my doubts about this product actually working. My problem was that I have a studio space in a loft above the garage. Anything that was plugged in or turned on downstairs would put a ton of static on my radio stations, making it impossible to hear what was being said or played. It was driving me totally nuts when people would come in and turn the lights on in the garage bays. Nothing I was doing would help, no matter what the position or height of the antenna. Apparently, there was enough "bleed" from the electrical lines on the 1st level that were on the same frequency as my radio (or something like that, it was explained to me but I don't remember the details.)So, I ordered these, I split my electrical cord and put one on each side of it, then put three on the antenna wire at 1 foot increments.Results? TOTALLY CLEAN SIGNAL, ZERO STATIC! Fantastic! I am one very happy customer. Thank you so much!

A Lifespan TR1200 treadmill and a Visio Tv. As soon as I stepped on the treadmill and pressed start, the Tv froze into pixelation. I tried separate surge protectors, no help. I put 5 of these on the Treadmill power cord and 5 on the TV power cord. And it actually helped quite a bit! Still an ocassional freeze up(especially in very humid weather) but a big improvement in my setup. It’s pretty low expense, so worth a try.