COWEEN Guitar Effects Power Supply for 9V 12V 18V Guitar Pedal Board 10 Core Isolated Short Cricuit DC-Tank with Cables This MOSKY guitar effect power supply with 10 isolated outputs: 8 for 9V pedals, the rest for 12V & 18V respectively. Isolated outputs mean that should any short circuits arise, the other outputs will will continue to function.This power supply has two brand: ( COWEEN & Mosky) will be shipped in random, but the quality is the same. Bright Blue LED For Pedal Board Lighting & Short Circuit Indicate. Compact and portable design, save much space for your guitar effect pedal board,built-in ventilation hole in the back of power supply, so you won't worry about heat problems when full load output. You can even reverse the polarity - though most pedals require negative to be the centre pin. Easy operation, no need of complicated installation . Comes with an AC adapter and 10 connecting cables.