1. Reduce electromagnetic interference: Our clip-on ferrite ring is made of nickel-zinc ferrite, at enhancing the electromagnetic field around the inductor, effectively preventing external interference and ensuring clearer signals in various electronic devices. 2. Convenient installation: the small sandwich ring is equipped with elastic buckles, which can easily connect and disconnect cables, ensuring a user-friendly experience, and can be quickly installed without any tools, which is very suitable for novices and professionals. 3. High efficiency and long service life: The filter core ring has excellent performance, high efficiency and long service life, which is very suitable to be placed near electromagnetic interference sources to improve the quality of audio and video signals without frequent replacement. 4. Signal quality protection: The noise filter suppressor is professionally designed and will not distort the transmission signal, which means that it will not affect the quality of audio, video or images, and at the same time effectively filter noise interference and realize excellent multimedia experience. Colour:Black Material:Nickel-zinc ferrite Package Contents: 1 x Edivation ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.