The Carl Martin Powerjack universal power supply for guitar effects employs switch-mode technology, allowing it to be used from 100V-240V. The Powerjack delivers 1670mA of stabilized 9V DC power at any voltage. Please follow all safety rules and regulations for the geographic region you are located in, and please consult your effects pedal manual before connecting the Powerjack to ensure correct voltage, polarity and plug type.