SIIG 6.2A USB Power Adapter 4-Port Black (AC-PW0L12-S1) Charges Galaxy Tab/Note, Surface, iPad, iPhone and other smartphones or USB powered devices 5V/6.2-amp total (shared) power output quickly and easily charges up to two tablet computers and two smartphones (or other USB powered devices) at the same time Automatically adjusts to the power requirements of device (2.1A for tablets, 1A for smartphones, 0.5A for MP3 players, etc.) Charging output 6.2A (max) - 2 USB Type A 2.1A and 2 USB Type A 1.0A Over-Current (OCP), Over-Voltage (OVP), Short-Circuit (SCP) protections