Used BEHRINGER ULTRALINK PRO MX882 splitter/mixer. As seen in the third photo, there is something attached to the top, like a sponge. It doesn't seem to affect the use of the device. *I am not familiar with this machine. I have confirmed that it powers on and that the buttons work, but I have not tested it by connecting it to anything. Please understand this. The power cable is not included. Thank you.