Features 1. Effectively improves the electromagnetic field around the solenoid to avoid external interference. 2. Will not cause distortion of the transmission signal and affect your audio, you can use it with ease. 3. Easy to install and convenient to use, can be disassembled, saving a lot of valuable time. 4. The noise reduction filter has good performance and high efficiency, has a long service life. 5. Used in all types of automotive electronic connection cables, wiring harnesses, household appliances. Specification Item Type: Noise Reduction Filter Material: Nickel-zinc ferrite Color: Black ID: Approx. 3.5mm/0.14in, 5mm/0.20in, 7mm/0.28in, 9mm/0.35in, 13mm/0.51in Usage: AV cable, coaxial audio, audio power cable, IP series camera, etc. All types of automotive electronic connection cables, wiring harnesses, household appliances, and electrical appliances. Clip onto the signal line to play the role of anti-interference and electromagnetic compatibility. Clip onto the power cable to stabilize the current and improve sound quality. Package List 50 x Noise Reduction Filters