Dunlop ECB-003EU

It supplies the power needed for my wah pedal (so ... easy 5 stars). It definitely changes the tone though. With a 9v battery you get one tone. Add the PSU and you get a second tone. Take the battery out of the pedal and you get a third tone. Something to definitely think about. One of those tones might be just the thing you were looking for.

Well, it is just a power supply, an optional accessory for Dunlop guitar pedals. On the face of it, it just does its job nicely. However, there are two points on the plus side that I'd like to highlight. Unlike some other power supplies that I had some experience with, this particular one is pretty quiet (does not produce lots of that mosquito-like tone when plugged in) and does not tend to heat up while in operation.

If you're looking to power a single pedal, this transformer does the trick. It has proven to add very low to no hum at all to the signal.
It is also very reliable.

really great adaptor . Completely noiseless

Just the right one charger !

Buy it. Its the best