What this does: Clipon ferrite bead choke filters reduce radiofrequency interference (RFI) and electromagnetic disturbances on cables, helping maintain clear digital and analog signals for USB, FireWire, telephone, powerline, coaxial, audio and video lines. Why you need it: Stops common sources of noise that cause data errors, audio buzz, video artifacts and connectivity problems. Useful for improving signal reliability without rewiring or replacing equipment. Kit contents and compatibility: Includes 5 clipon filters with inner diameters of 3.5 mm, 5 mm, 7 mm, 9 mm and 13 mm to fit a wide range of cable thicknesses. Suitable for home, office, industrial and electronics cabling. Easy installation: Double snap closures and a sturdy plastic housing let you attach the filters directly to cables without tools. Snap on, snap off for fast deployment and repositioning. Construction and performance: Nickel zinc ferrite core in a density 4.9 g/cm3 magnetic material. Rated with 400 saturation magnetic induction and 1000 initial permeability for consistent passive filtering performance on general components and semiconductorconnected lines. Where it helps most: Clean audio and video: Eliminate buzzing or picture distortion on AV setups, HDMI adapters, set boxes or camcorders connected by coaxial, audio or video cables. Reliable data transfer: Reduce USB or FireWire interference on hubs, external drives and peripherals to lower data errors and improve connectivity stability. Network and telecom lines: Suppress noise on phone, powerline or coax runs in home offices and small business installations to maintain clearer signals and fewer dropouts. Practical benefits: No downtime for installation, reusable and portable, covers multiple cable diameters in one kit, and provides broadspectrum magnetic suppression without active components. Suitable applications: Home theater systems, desktop and server racks, CCTV and security cameras, telecommunications rooms, audio recording setups, and field service work where quick, tool EMI mitigation is required.