The Iso-Brick is small and light but packed with quiet, noise-free DC power ready to drive a variety of pedals. The ten outputs are fully isolated, which eliminates ground disturbances. The MXR team has given the pedal's outputs different current and voltage. 2 pcs. 9V/100mA, 2 pcs. 9V/300mA, 2 pcs. 9V/450mA, 2 pcs. 18V/250m, 2 pcs. 6-15V/250mA.