Input: AC 100V-240V, 50/60 Hz Output: DC 9V1A (10-1000mA) MAX: 1000mA, Center Negative(-), External Positive(+), DC Plug Size Of 5.5x2.1mm This product is compatible with guitar pedals with currents ranging from 10mA to 1000mA. You can also pair it with a daisy chain cable...