iSunnao WP-998 International Power Adapter and Travel with Dual 2.1A USB Charger - Cover over 150 Countries The USB ports feature the over charging protection It will stop working automatically when your personal electronic battery is full The USB ports feature the over current protection The over current protection protects your portable gadgets and adapter your electronics and adapter from any over current flow damage during charging International travel adapter with protect shutter and 4 plug types - USA / EU / UK / AUS