SpecificationSize: 3.5mm (Suitable for 1.5-3.5mm cables); Package Includes: 5 x Ferrite Core Ring<br> Reduce Single InterferenceThe ferrite core effectively helps in reducing electromagnetic interference(EMI) and RF interference(RFI), and get clearer signal and audio quality.<br> Detachable and ReusableClip on wire and removable easily. It won't cause any distortion during signal transmission.<br> Wide ApplicationMainly used for electronic connecting wire, air conditioner, PC, AC power lines, video and audio cable, telephone line, and other home appliances etc.<br> Better ShieldingIf the wire is too thin too loose or you want get better anti-interference effect, you could wrap it around more.<br> -Clip on ferrite bead cable can be used on all kinds of wire cords such as: Power Cord, Audio Cables, AV Cable, Data Cable, USB Cables.<br> -It helps improving the electromagnetic field and signal quality around the cable, avoiding outside interference.<br> -It won't cause distortion of the transmitted signal and won't affect your audio, video and picture quality.<br> Note:<br> Please install them in place near the interference source. (Near the import and export of shielding case as much as possible.) If a cable has equipment that needs to be protected on both sides, install one at each end. Identifying and troubleshooting affected and offend devices are necessary for successful installation.<br> Specification:<br> Model: 3.5mm<br> Color: Grey<br> Fit Cord Diameter: 1.5mm-3.5mm (0.06"-0.14")<br> Size: 13 x 25mm (0.51" x 0.98") (D*L)<br> Application: Driving Recorder DVR, Audio Cable, Mouse Keyboard Cable, USB Cable, Headset Cable, etc.<br> Package Content:<br> 5 x RFI EMI Filters<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store