What you need to do before use the products?<br/> #Confirm the Power Rating of your Products is a Dual Voltage(100-240V AC) or Single US Voltage( 110V, 120V, 125V or 100-120V) <br/> --Single Voltage Devices: Read the parameter of product shows on the Power Label that is 110V AC, 120V AC, 125V AC or 100-120V AC<br/> --Dual Voltage Devices: Read something like 100-240V AC. <br/><br/> If your device is110V single voltage, when will you need use the Converter Socket? <br/> #When travel to a 220V country, your 110V device need to be plug into the Convert socket. <br/> If your device is 100-240V dual voltage, what socket do you need to use? <br/> #Such situation you can use the adapter socket or the USB ports all over the world.