What is the power output of a USB port?

usb 2 0 slot   Dan usb c slot

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The USB interface is probably the most widespread interface in the world, both in domestic and industrial environments The USB standard is a serial bus Universally compatible with existing USB and Thunderbolt products; Define port capabilities for predictable and consistent user experience; Increase host

refill slot identify them, it's simple to see the difference between USB and USB Which USB Device I have a question, Can I plug a USB Type B cable into a USB Type B port and have it work? I've been looking for a 30 foot cable and