Dear Valued Customers: The USB Charger 3 Ports Total Current is 3.4A Max. USB 1 Port Current is 5V 1A USB 2 and USB 3 Port Total Current is 5V 2.4A Max. If you use USB2 Port and USB3 Port at the same time, single output current may be 5V/1.2A Max if you only use USB2 or USB3 one port, single output current maybe up to 2.4A Max. Pls know it before you buying it. Thank You for your kind understanding.