KHOZMO 48 Step Attenuator, 3 channel passive Preamplifier.. Hardly used over the two years or so since new. I have two and the black one gets used. This one still feels sharp. Heavyweight and current spec though, these tend to be custom made. I dont remember which brand of resistor was used or if silver wire was used though I suspect so. This is conventionally wired / RCA ie not intended for a balanced system. The little socket at rear is a 4 pin aviation type to supply low coltage dc to a remote control and not connected. For the avoidance of doubt neither Attenuator nor channel selector are remotely controlled nor is there any sensor. Overseas purchasers will be responsible for any tax or duty levied in the recipient country. The complications of export may cause an extra day being taken for posting.