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 supply Input Voltage: 100V~250V Outputs: 8 Output Connectors: 2.1 * 5.5mm Output Voltage: 9V, 12V, 18V Max. Output Current: 2000mA Isolated Outputs: yes Polarity: center negative Cord Length: 25-50cm Indicators: power, fault Controls: mains voltage selector Item Size: 14 * 8 * 3.2cm / 5.51 * 3.15 * 1.26in Item Weight: 261g / 9.21oz Package Size: 20.5 * 18 * 6cm / 8.07 * 7.09 * 2.36in Package Weight: 621g / 21.91oz Package List: 1 * power supply 1 * power adapter 8 * DC cables 1 * user manual