This is an electronic crossover and equalizer for professional audio equipment. It has input and output ports for 3.5mm TRS, XLR. The device is made by EV.

Powers on, XLR ports haven't been tested since I don't have the setup necessary to test all the ports. That being said, it powers on and has been kept in a dry cool place, no reason to believe it's lost any functionality. Small scratch on top of front plastic and some light scuffs on the metal parts, but in great condition otherwise.

(A)