1) Use your USB charging cables to connect to the USB output of the charger, while connecting the other sides with your devices. 2) Plug into the socket among 110-240V, the charger is ready when the devices indicate in charging status 3) There are 2 ports, the total max. current is 2.5A.The charging speed will be affected by devices total required current. Usually you can charge 2 devices at the same time. In general, 2.1A output is ideal for a tablet PC, 1.0A output is ideal for a smartphone.
