I take a prototype of the new Mission 529 USB effects pedal power converter into the lab, and test it with a variety of different pedals and power sources including power measurements and audio tests.
The 529 converts a USB power supply such as a battery, wall charger, or computer USB port, into five isolated 9V outputs for powering effects pedals. A USB output allows multiple 529 units to be chained together to increase the number of outputs.