What is the electronic frequency for the us?

The standard power in the U.S. is usually 60 Hz, but in much of Europe, and other parts of the world, the standard is 50 Hz, thus factories which want to manufacture products in the U.S. for export to a country which has the standard of 50 Hz will need a frequency converter that converts 60 Hz power to 50 Hz power. This is also true for factories in countries which have a standard of 50 Hz manufacturing products which need to be tested for use in the U.S. at 60 Hz.