Isolate the potential difference between the two systems to prevent damage to the input level of the device due to excessive potential difference. Achieve safe transmission of audio signals and remove noise caused by the connection of audio equipment; solve the AC noise caused by power consumption, wiring, lighting interference, etc. on the site. Remove the noise generated by connecting a laptop to a mixer, and the noise generated by connecting other audio hosts to a mixer. Noise generated by long-distance transmission between devices and noise generated by impedance mismatch.<br><br>Note:due to different production batches, there are differences in printing screen printing, which does not affect the use. Colour:Black Material:aluminum alloy<br><br>Package Contents: 1 x Audio signal isolator<br><br>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.