It is one of the best comprehensive universal single power block nowadays and its almost fully function can meet most of the effects. It uses a high-quality built-in R -shaped transformer, which is better than VOODOO, a separate DC 9V output, as well as an independent short-circuit protection, and they make the noises made by the power reduced to the lowest, and also make the other effects operate normally even if one of them are damaged . In addition, it provides the stable and clean current , ensuring that your effects work perfectly and produce the best tone . It can provide a high voltage AC output for you to power your MIDI control pedal on your rack effects. And there are six DC 9V 100mA outputs , two 9V DC 300mA outputs. What's more, the 7 and 8 outputs can also adjust the 4-9V voltage output.