The Korjo 4 x USB-a power hub is a clever way to charge up to four USB devices when traveling or at home. It has 4 interchangeable pin configurations (AUS, UK,US and EU), so you can use it almost anywhere in the world. •Automatic multi-voltage 100-240v, output 2.1a max. •Use with your own USB cables (cables not included). •Input voltage ac 100-240v 50/60h, output voltage 5.0v +/- 0.25v, output current 2.1a max. •Overpower protection 18w @ 240v ac. Short protection auto recovery. Approved by Australian electrical authorities.