Clip-on Noise Filter,VSKEY[10pcs 5mm] Anti-interference High-Frequency Ferrite Core Choke Cable Clip for Home Audio System,Tvs,Speakers,Radio,Audio Equipment Noise Suppressor (0.2 inch inner diameter)

They work well to eliminate radio squelch between antenna, ptt, and electronic headset.

The ignition on one of my older motorcycles is noisy enough (RFI) that it was causing my GPS to turn off at certain RPM ranges... there was one OEM ferrite already in place, inadequate but adding two of these to the power feed to the GPS has eliminated the problem. Good quality, no "they won't snap shut" issues I've seen reported with other brands.

I bought this to insulate the wiring on my computer speakers at work. I have to keep my cell phone nearby, but the static coming through the speakers was almost unbearable and mostly unpredictable. I bought the 5mm chokes, and they comfortably snap around the wiring to the speakers without being too snug or damaging the wire. I probably could have went with the 3mm and had similar results with a snugger fit.The cellular interference isn't completely gone, but largely reduced. Now it is barely noticeable.

These did not work for heater fan noise.

someone must have threw the package because some of the beads were broke and the plastic container it came in was cracked and broken just threw the broken one's in the garbage I guess they are working noise level is lower

I did not know what these were, attached to many products I had purchased in the past. I purchased a new Vtech phone system and upon "reading" the instructions found that the noise cable rings were not included! Now I looked in my Amazon "also bought" box and found these rings listed. This pack of ten allowed for my installing on additional items in my home. The lowering of that background sound on my phone line explained why you need these! they are small and work as advertised!

My Theater system has speaker wires running parallel with power cords. Dumb. I Had terrible popping and static, these eliminated all the interference.

Came on time but didn’t remove pulsing noise to portable speakers we use for car DVD player when clipped to wires. Put all of them on the wire with no help