1.Great for cutting noise on AC power lines,USB cable,mouse cable,keyboard cable,headset cable,video cable,audio cable,data cable,Phone cable Car Headlight Cord, Power Cord;

2.These snap-on ferrite ring cores are superb at reducing electro-magnetic interference and filtering out high-frequency noise pulses to improve signal integrity;

3.Made of plastic housing and ferrite core,with inner self-adaption clip can mount on cables tightly and work for a super long time;

4.Magnetic Ferrite Ring Core Fits for cord with 3.5mm inner diameter, The Cable Clip doesn't cause distortion of the transmitted signal and won't affect your audio, video and picture quality;

5.Easy to install and convenient to use.The cylinder can be dismountable, and the port has the elastic clip fastener.Closer to where the electromagnetic source is, the more effectively to improve the signal quality of audio and video.