Features: 1. The Ground Loop Isolator connect to the AUX Jack in car to eliminate noise.You will enjoy good quality sound when use it with Ground Loop Noise isolator. 2. Eliminating Buzzing Noise caused by ground loops in some car speakers / home stereo systems. 3. No external power supply, this noise isolator can achieve a clear speech/music by eliminating the current noise in some car speakers / home stereo systems. 4. Works with any portable device that has 3.5mm audio jacks, for your Car Audio System/Home Stereo. 5. Compact and lightweight, it will not take much space and can be easily taken away. 6. With interface design of Isolator,m can effectively protect the circuit. Specifications: Size: approx. 2.01 * 0.59 * 0.59 IN, 0.99 OZ Audio input: stereo Frequency response: 20HZ-20KHZ Audio Interface: 3.5mm Package Included: 1 x Ground Loop Noise Isolator 1 x Audio Cable