Switching Power Supply. This power supply cycles so far above the range of human hearing that ripple-based buzz (60 cycle hum) is eliminated. At 1.67 amps of current, Power Pad II will deliver 9 volts every time and can power an unlimited number of pedals. AC and DC power is circuit protected. Includes an AC courtesy outlet which solves the problem of different voltages and reversed polarities, Eight 2.1MM 9VDC outputs and cords and an IEC inlet with 10' AC power cable. You can also daisy chain additional pedals using a daisy chain connector and connecting it to one of the 8 outputs.