This universal pedalboard power supplu probides 8 center negative barrel jacks with a total output of 2000mA. Outlets A and B are switchable to 9, 12 or 18 volts to power effects that require higher DC cuttents or 9 volt pedals that can be operated on 12 or 18 volts for more dynamics and headroom. This pedal power station is fully regulated to deliver constant voltage and protected against short circuits and overload.Features:Small size, compact design with full metal case, stable and durable.The yellow colored jack (12V DC, 2000mA) is the input jack for the mains adapter of the power supply box.Outlets A and B are switchable to 9, 12 or 18 volts and isolated from each other as well as from the 9 volts outlets 1 to 6.Two 3-way voltage selectors are located on the rear of the power supply box, each select 9, 12 of 18 volts output for outlets A and B.Bi-color LEDs indicate outlet status, they turn from green to red to indicate a pedal fault (short curcuit, wrong polarity) while the pedal power station switches into self protection mode.Specifications:Type: multiple power supplyInput Voltage: 100V~250VOutputs: 8Output Connectors: 2.1 * 5.5mmOutput Voltage: 9V, 12V, 18VMax. Output Current: 2000mAIsolated Outputs: yesPolarity: center negativeCord Length: 25-50cmIndicators: power, faultControls: mains voltage selectorItem Size: 14 * 8 * 3.2cm / 5.51 * 3.15 * 1.26inItem Weight: 261g / 9.21ozPackage Size: 20.5 * 18 * 6cm / 8.07 * 7.09 * 2.36inPackage Weight: 621g / 21.91ozPackage List:1 * power supply1 * power adapter8 * DC cables2 * adapter cable1 * user manual