Voodoo Lab PPAY Pedal Power Cable 2.1mm Barrel (Voltage Doubler, Plug Output, 10cm)
Voodoo Labs Pedal Power 2 cable for pedals with higher voltage requirements, use this voltage doubling adapter with a 2.1mm jack to combine two Pedal Power outputs to make 18V or 24V. Ideal for MXR Flanger and Dime Distortion, Crybaby 535Q, various Fulltone and Keeley products.This adapter will accept any cable with a 2.1mm plug.
Does exactly what it claims. Doubles power from two outlets.