Joyo JP-01 is a solution for guitar and bass players with varied effects. Some require 18 volt and some require the standard 9 volts DC. Basically, Joyo put two separate output circuits into the same box. Fed from the DC 18 volt, 1000mA input, the outputs measure DC 18 volt, 600mA and DC 9 volt, 800mA, standard for most effects. The JP-01 Power Supply feeds the required voltage and current to up to 10 Guitar or Bass Effect Pedals simultaneously. The package includes the AC adapter and incredibly, 10 power cables. So with the actual unit to provide the necessary output. Get the Joyo JP-01 to avoid the uncertainty and hassle of having to unplug all the interconnects after every jam ses. Reliable power for all your effects, thanks to internal short circuit protection (SCP) designed to prevent voltage overload and shorts. Power adapter included. Measures 11.8 cm length by 6.4 cm height by 3.8 cm width.