Audio common ground isolator, eliminates current noise/noise. 3.5mm interface, universal for multiple devices. Built-in dual low-frequency transformers to solve the problems of common ground current and noise. Isolate two audio devices with the same ground to eliminate the noise and current noise generated by the common ground of the devices. Small and convenient, easy to store and carry. Different batches may have different appearances, but will not affect the use Colour:Black Material:Aluminum alloy + plastic Package Contents: 2 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.