VSKEY Noise Filter Cable Ring, [10 pcs] Anti-interference Noise Filters Ferrite Core Choke Clip For Telephones,Tvs,Speakers,Video,Radio,Audio Equipment & Appliances Power Audio (10pcs 7.0mm)

Reinstalled my LED auxiliary backup lights after getting rear-ended but they didn't get along with the new backup sensors and whenever the lights were on the backup sensors would go off like I was right against an object behind me. I really didn't think these would work but they did. Now my backup sensors work normally. I was very surprised and very happy. But like another reviewer said it's really hit or miss it all depends upon what frequency the RF is at.

Anti-Interference "chokes" don't always do much at all. These are very well made but may not make any perceivable difference.

I have a 1997 Mazda Protege DX with an aftermarket radio in it, I'm restoring it because it was my mother-in-law's car and she passed away about a year ago and I'm going to restore it and give it to one of the kids,, that being said I installed some hid LED headlights with a ballast after I did that I could pretty much only pick up a couple of radio stations because of all the static when the lights were on.I did some research on ferrite and saw this product which I have now purchased and as soon as I installed them on the lines between the LED ballast in the Headlights about 90% of the static left and I was able to receive my radio stations.I have since purchased more ferrite and installed these on my radio antenna and also on the lines coming out of my alternator, and they seem to do a pretty fair job of reducing that static noise that you get in some vehicles on the radio when your turn signals are blinking on and off and so forth if you're having a problem like this I think they're worth giving a try.

Got these to block RF on woven cover guitar cables. Measurement of the guitar cable is just under 7mm OD. The 7mm ID chokes will not close over this cable. They work fine over slim audio cables and power cords. Gonna have to probably get the 10mm for them to fit.

Absolutely not worth a penny. Does not change anything. complete waste of money. Garbage.