The power supply 1 SPOT you can use anywhere in the world without a voltage converter because it automatically converts voltage worldwide. No need to worry about AC hum interfering with your sound either. the 1 SPOT is one of the quietest power sources. It is the 9V DC adapter that only takes up one spot on your power strip. With the ability to handle up to 1700mA, the 1 SPOT can power your entire pedalboard.