Connect and charge up to four USB devices directly to a mains socket anywhere in the world. Suitable for most items that are charged via USB, including iPhone, iPad, mobile phones, Samsung Galaxy, tablets, digital cameras, GPS, game consoles etc. Newer products requiring charging via USB need more and more power. Whereas some older, smaller products only needed 0.5A, some devices need 2A. If your device needs to draw more power, 0.5A and 1A devices may not be sufficient to charge your devic. As the Korjo USB hub shares the power across as many sockets as are in active use, for most efficient charging, only plug in those devices that need charging, and remove devices once they are fully charged.