As an AC DC power adapter manufacturer in China, we are professional in making Chinese power adapters, with 12 years of R&D innovation capability. We produce the national standard adapters (CCC)which have two flat pins without small holes.
We are reliable for security since we have the 100% high voltage test,100% aging test and 100% full inspection. Our product types are comprehensive: wall mount power adapters, interchangeable plug power adapters and desktop power adapters.
In the US, the power plugs and sockets are of type A and B. Plug type A is the plug that has two flat parallel pins, plug type C is the plug which like type A but with an extra prong for grounding. This socket also works with plug A.
The US and Canada use a supply voltage of 120 volts ± 6%. Japan wall adapter, as well as Taiwan, Saudi Arabia, North America, Central America and some parts of northern South America, use a voltage between 100 V and 127 V.
The standard voltage is 120 V and the standard frequency is 60 Hz. Small prints on the device or 15W power adapter indicate what voltages the device can work with. If you see 100-240V 50/60Hz printed, the adapter is rated to work on all voltages used worldwide.
In England, the standard voltage is 230 V and the frequency is 50 Hz. You cannot use your electric appliances in the USA without a voltage converter, because the standard voltage in England (230 V) is higher than in the United States of America (120 V).