Includes a 5VDC, 4A power supply. It has a combined maximum power of 4A, but realistically not everything will be charging at the same time. This unit incorporates BC 1.2 technology which is able to detect your devices fastest charging speed for smartphones and tablets. This is a 10 port USB hub and charger in one, so you can transfer files, and charge devices at up to 1.5A from each port. Includes a 5VDC, 4A power supply. It has a combined maximum power of 4A, but realistically not everything will be charging at the same time. This unit incorporates BC 1.2 technology which is able to detect your devices fastest charging speed for smartphones and tablets. This is a 10 port USB hub and charger in one, so you can transfer files, and charge devices at up to 1.5A from each port. Includes a 5VDC, 4A power supply. It has a combined maximum power of 4A, but realistically not everything will be charging at the same time. This unit incorporates BC 1.2 technology which is able to detect your devices fastest charging speed for smartphones and tablets. This is a 10 port USB hub and charger in one, so you can transfer files, and charge devices at up to 1.5A from each port.