A clone of the well-known Sunn Model T amplifier. It works fine, but there’s a minor issue with the toggle switch sometimes it doesn’t make good contact, and you have to fiddle with it a bit. I can send you a video so you can see what I mean. I haven’t taken it to a technician, so I’m not sure if it can be fixed; it didn’t bother me much for home use, but I wouldn’t recommend it for live performances, as it would likely drive you crazy.No original box and no returns.