This is a Ground Loop audio Isolator, Acoustic Noise Filter, audio current sound, Transformer signal noise reducer. Remove . the noise caused by ground loops when the audio source and (some car speakers/home audio systems) use the same power supply, so as to achieve clear music enjoyment, and the best will bloom from there. quality. There is no damage of rock music, a better experience, and can be used on mono. Easy to use, just plug and play, no battery required. Small and portable, this gadget doesn't take up much space and is easy to take away. Works with any portable device that has audio jacks, for your Car Audio System/Home Stereo. This product can only noise and current noise caused by common power and common ground products, but cannot noise caused by other reasons, so you need to confirm of the noise yourself. Specification: Model: R2 input channel: 2 output channel: 2 Input impedance: 600 Output impedance: 600 Installation method: plug and play desktop Frequency response: 20Hz-20KHz Level Loss: 0.03% @ + 22dBu Insulation resistance: DC1000V 100M Isolation voltage: AC 50Hz-60Hz/0V-1500V Wiring port: Hot swap: support hot swap Material: plastic+metal colour: As shown Package Contents: 1 x audio isolator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.