Built-in USB power port to charge your cell phone PDA iPOD/MP3 player or other USB chargeable device Ultra Compact Universal Li-Ion Travel Charger Worldwide Compatibility with 100-240V AC Adapter Works with virtually all 3.6-7.4 Volt Li-Ion batteries with the proper adapter plate (required - sold seperately) Built-in fold-down / flip-up AC plug - no AC adapter to carry 3 Year Warranty