This adapter can charge 2 USB devices simultaneously. Charge any devices that rely on USB for power. You name it...digital cameras, high tech accessories, PDA and mobile phones, etc. Simply connect a USB cable (not included) to your device(s) and then to the charger module. World traveler (100-240V). The innovative travel charger automatically adjusts to all voltages and frequencies in the U.S., Europe, and Asia. LED charging indicator shows charging status. Patented circuit board design to protect your valuable gadgets from short circuits.