What is a mA?

mA (milliampere) refers to the amount of current that a pedal requires to function properly. When setting up a pedalboard, add up the mA requirements of all your pedals to make sure the total current draw doesn't exceed the capacity of your power supply. For example, if four pedals draw 50 mA, 100 mA, 20 mA, and 150 mA, the total draw is 320 mA.