The Samsung Galaxy Ace S5830 battery charger can be charger by household power 100-240V or by car charger or mobile power source 5V/400mA.You can plug the charger into the wall using the US plug and charge your battery. You can plug the charger into a computer's USB port or other power source with USB port and charge your battery or charge another USB device by connecting it to the charger's USB port. With the included EU plug adapter you could charge your device when travelling in European. - PE case material - Input: AC 100~240V 150mAh - Output: DC 4.2V 350mA+/-50mA - USB output: DC 5.2V 800mA - Suitable for Samsung Galaxy Ace S5830 - Comes with EU plug adapter