PowerDuo combines our micro form‎-factor PowerBlock AC charger and PowerJolt 12 volt auto charger in one convenient bundle‎.‎ Use PowerDuo to charge all kinds of devices at home or in your car‎.‎ Just plug in the USB charging cable that comes with your device‎.‎ In the car‎,‎ PowerJolt lets you charge two devices at once‎.‎ Each charger takes up minimal space during use or while traveling‎.‎ But don‎'‎t let the size fool you‎;‎ each delivers a full 5 watts of power for fast‎,‎ dependable charging‎.‎