Review on 🔇 Pienoy 20 PCS EMI RFI Noise Filter Cable Rings/Suppressors - Ideal for 3mm, 5mm, 7mm, 9mm, and 13mm Diameter Video Cable Power Cords (Black) by Esvin Hopuhnopuhlis

The cheap speakers in my bedroom that I use to play white noise at night pick up my neighbor's Morse code transmissions that keep waking me up. I ordered it on the advice of a radio amateur. I had to use most of the pack and it worked much better using the big ones and wrapping the cord a few times instead of just snapping the small ones, but I no longer wake up knocking every time my neighbor is chatty at night. and I didn't have to ask him to fiddle with his antennas. Worth the money to keep the peace in the area.