uxcell 5 Pcs UF-50B Clip on Noise 4mm Cable Ferrite Core Filters
Specifications:/descriptions:/p uluhelps reduce EMI on AC power lines.black plastic enclosed ferrite core for 5mm AC power cords.great for cutting noise on USB, fire wire, phone, power cord, coaxial, audio, video etc. Cables. easy structure and convenient installation. Just clip it on and you will get clearer signal and faster data transmission./ulup /p.