1. Conveniently gives your charger battery a boost whether you are on a business trip, in a hotel, or at home. 2. Small and lightweight accessory. 3. Features fold-away prongs for easy travel and storage.4. World traveler (100-240V). The innovative travel charger automatically adjusts to all voltages and frequencies in the U.S., Europe, and Asia.5. Great for users who frequently travel and as a replacement charger.6. Not compatible the models for Nintendo DS.