This switched mode power supply can output any of seven easily selected voltages - 3V, 4.5V, 5V, 6V, 7.5V, 9V and 12V. Up to 1A of current can be supplied at all voltage settings. Interchangeable mains plug adapters and automatic mains voltage selection. The supply is also protected against overloads, short circuits, mains supply instability and overheating.