I just received this unit today. The external power supply was made for European outlets. (I live in Canada). You should probably order the required outlet adaptor. You can always return it. When I eventually get the working, I'll leave another review. I'm a little disappointed at the moment.This is the other review. I bought an adaptor and everything is up and running. This is a wonderful little unit. I'm not getting any noise or hum at all, just clean music from my turntable to my amp. Everything starts with the preamp and this one was a good purchase. I'm using inexpensive, but shielded, audio cables and keeping them separate from the power cables. You will be very happy with this unit. It's very small and looks as good as it performs.