WOFALA USB Charger-PowerPort 6(33W 6-Port USB Charging Hub)Multi-Port USB Charger for Iphone, Ipad, Samsung, Nexus, HTC, Sony and Much More (Black) Up to 6 charging devices simultaneously, the powerful PowerBot PB5000 repid USB charger with Smart IC intelligently identifies the energy required to maximize the efficiency and performance to deliver the power to the devices effectively at minimum effort. Each USB port is equipped with built-in intelligent resister and detector to prevent the devices from over charge, short circuit, over heating while preserving the battery life of the media devices; allows it to be safely used with any USB devices. Varity of output charging network can be recognized Smart regulate power,overcurrent / overvoltage / short-circuit protection AC 90-240V input voltage ideal for international travel