The Strymon Zuma R300 is a high-horsepower, technologically advanced low-profile effects pedal power supply. You get clean, rock-steady power for your 9V, 12V and 18V effects pedals in a pedalboard-friendly, expandable package, giving you plenty of room to grow. The ultralow profile design of the Zuma R300 means that it can fit under just about any pedalboard. Dual-stage topology, pre-regulated outputs, optically isolated feedback and advanced multistage filtering all result in a power supply that allows your pedals to achieve their highest possible dynamic range.