The MXR Mini Iso Brick power supply is what you need if looking for a space-saving solution for your downsized travel board or you just need to power a small, carefully curated selection of tried-and-true staples, this pedal power supply has what you need all while taking up less space than a candy bar. 

Features

Has five outputs, and each is fully isolated to eliminate obnoxious, gig-ending ground loop noise
Four of the outputs supply 9 volts of power at 300mA
While a fifth can be set to provide either 9 volts or 18 volts at 800mA depending on your needs
Has an ability to handle both negative and positive grounds, these outputs will accommodate almost any pedal, analog or digital.
It comes with a splitter cable that can be used to connect two pedals to a single output, provided they require the same voltage and you don’t exceed the output’s current rating. You can do this with all of the outputs simultaneously—just purchase the extra cables to do so.
Comes equipped with LEDs to let you know that all your connections are solid Lightweight housing that's built like a tank, and you can step on stage with confidence that your pedalboard will stay powered from gig to gig