The isolator interface design can effectively protect the circuit. Eliminate the hum caused by the grounding circuit in some car speakers/home stereo systems. Suitable for any portable device with 3.5mm audio jack, suitable for your car audio system/home stereo. The ground loop isolator is connected to the AUX jack in the vehicle to eliminate noise.When used with the ground loop noise isolator, you will enjoy high-quality sound. Easy to use, plug and play, without battery. Copper compartment, effective interference, improve sound quality. Package: 1 grounding circuit noise isolator with cableProject specification:Type: ground loop noise isolatorAudio interface: 3.5mmFrequency response: 20HZ-10KHZAudio input: stereoColor: blackPackage includes: 1 * isolatorNote:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding2. The color may vary depending on the display. Please understandNote:Hello, please pay attention to your shipping address when purchasing products. If your receiving information (such as name, street, house number, doorbell/email without name) is incorrect, the order will not be delivered correctly.)