Premium PerformanceWith global voltage compatibility 100V-240V and 5V/1A stable output current, the USB Wall Plug enables you to charge your mobile devices at safe high speed. Easy to connect usb cable into your device and then to the charger module. Charging will stop when battery is full. Safety PromiseSingle Port USB Charger Block is made of premium fire proof shell. And it has over-current, over-charge, over-heat protection system to keep you and your devices safe, which will provide you a faster and safer charging experience.