Usage Tips:Clip on ferrite bead cable can be used on all kinds of wire cords such as power cord, audio cables, cable, data cable, usb cables. It helps improving the electromagnetic field and signal quality around the cable,oiding outside interference. It won't cause distortion of the transmitted signal and won'tfect your audio, video and picture quality. Features - Material: Nickel zinc ferrite.- The ferrite core helps in reducing high frequency interference caused by home appliances and electronics.- Clip on ferrite chokes with self-adaption clip can mount on cables tightly and work for a super long time.- Suitable for AC power lines, USB cable, mouse cable, keyboard cable, headset cable, video cable, audio and data cable, etc.- Mini shape and removable. It won't cause any distortion during signal transmission.- Well made and high quality, made of durable housing and ferrite core.Packing list: 25 x suppressor filters