1. Product usage:(1). Clamp on the signal line to play the role of anti-interference and electromagnetic compatibility(2). Clamp on the power cord to stabilize the current and improve the sound quality2. Nickel zinc ferrite. It can improve the electromagnetic field around the solenoid to avoid external interference3. Easy to install, easy to use, can be disassembled, there are elastic clips on the port4. Good performance, high efficiency and long life. Placing it near an electromagnetic source can more effectively improve the signal quality of audio and video.5. The cable clamp will not cause distortion of the transmission signal, nor will it affect your audio, video and picture quality6. Application: car DVR, headset cable, speaker cable, mouse cable, keyboard cable, USB cable, etc.Scope of application: applied to all kinds of electronic connecting wires, wiring harnesses, home appliances, air conditioners, computers, inverters, electric welding machines, power cords, etc. (Note: When the wire is too thin, you can wind a few more turns at the magnetic ring to achieve Loosening effect.)7. Material: Ni-Zn Ferrite8. Inner diameter: 7mm9. Specifications:7mm / 0.27in (inner diameter): suitable for 0.2-0.27in / 5-7mm cablesSpecification: Package Weight One Package Weight 0.13kgs / 0.29lb One Package Size 14cm * 10cm * 2cm / 5.51inch * 3.94inch * 0.79inch Qty per Carton 120 Carton Weight 15.90kgs / 35.05lb Carton Size 38cm * 32cm * 28cm / 14.96inch * 12.6inch * 11.02inch Loading Container 20GP: 783 cartons * 120 pcs = 93960 pcs40HQ: 1818 cartons * 120 pcs = 218160 pcs