I bought this used a few years ago for my audio equipments , but it has a low humming noise. I’ve changed out all the fuses, and that didn’t help. Not sure what the problem is, and I don’t want to bother with it anymore. All the outlets work. If you’re still reading this, it’s free. Just come get it. Reply with your name and number, and I’ll text you back. Want to get rid of this ASAP.