Isolated Power Supply with voltage selection

Power your pedals with Ojai R30—the highest horsepower, most technologically advanced effects pedal power supply of its size. You get clean, rock-steady power for your 9V, 12V and 18V effects pedals in a low profile, expandable package, giving you room to grow.
Ojai R30’s dual-stage topology, pre-regulated outputs, optically isolated feedback, and advanced multistage filtering allow your pedals to achieve their highest possible dynamic range.

Ojai R30 weight: 6 oz. (171g)

Included Strymon PS-124 power brick:
Model: YJS036A-2401000U
Input: 100-240v AC 50-60Hz 0.8A max
Output: 24v DC 1000mA
Dimensions: 4.2″ x 2.15″ x 1.25” (107mm x 55mm x 32mm)
Weight: 4.7 oz. (133g)

http://www.strymon.net/products/ojai-r30/