Neewer&reg; Aluminium Alloy Guitar Pedal Power Supply 10 Isolated DC Outputs for 9V/12V/18V Effect Pedal with DC Power Adapter, DC Power Cables and Polarity Reversal Cables Kit includes: (1)Guitar Pedal Power Supply + (1)DC 18V Power Adapter + (10)DC Power Cables + (2)Polarity Reversal Cables Neewer Pedal Power Supply features 10 isolated Outputs with separate short-circuit protection Power: AC 100v-240V. Input: DC 18V. Powers for 9V, 12V or 18V pedals Solid aluminium alloy construction with slim and compact design. With LED lights for short circuit indicating ATTENTION: Incorrect polarity would damage this unit, please make sure correct positive and negative polar before wiring. PLEASE read through the User Manual before wiring