Dunlop POWER SUPPLY AC 9 Volt Adapter for Guitar Effects Pedals ECB003    This AC adapter provides 9V DC current for most pedals requiring 9 volts of power. Check specifications to make sure this adapter is the right fit for your pedal.    Tech Specs  This is a 9V AC @ 670mA 5% regulated. 2.1mm X 5.5mm Barrell negative center.  Type: Dunlop Power  Input Voltage Range: 100-240V AC, 50-60Hz  Output Voltage: 9V DC  Output Amps: 0.66A  Sleeve / Tip Configuration; Sleeve: Positive, Tip/Center: Negative  Compatibility: Dunlop Pedals  Manufacture Part Number: ECB003    Fast & Free Shipping!