AGPtek&reg; Guitar Effect Pedal Processor Power Supply Adapter + 7 way Daisy Splitter Cable Kit 9V DC 1A US Standard. Negative -Sleeve, Positive-Center. Designed specifically for powering multiple effect pedals. Input: AC 110-240V, 50-60Hz. Output: DC 9V 1A DC Plus Dimension: 5.5mm * 2.1mm Regulated to eliminate all mains hum or buzz, Rigorous Tested for Effect Pedals, no any Current noise. This product can use for DC output power, pedal power supply and LED leds.