3-12V universal power supply with regulated output voltage; protected against short circuit; included are different output connectors which can be connected to the output cable with the desired polarity; world wide application possible due to wide range input (100-240V AC) and changeable input plugs for Europe, UK, USA and Australia; selectable output voltages by a rotary switch: 3V / 4.5V / 5V / 6V / 7.5V / 9V / 12V DC; maximum output current: 600mA; maximum output power: 7.2W;