How to test usb c cable speed?

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To use the tester, plug one end of the USB-C cable into the input port of the tester and the other end into the output port. Then, connect the tester to your computer or any other USB-C device. The tester will display the voltage, current, and power readings.

Does the iPhone 14 series come with a charger?

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Apple claims that in order to reduce global carbon emissions, from October 2020, all iPhones on sale will no longer include other mobile phone accessories and need to be purchased by themselves. but what kind of charger should be used for the new Apple 14 mobile phone, will Apple 14 mobile phone be upgraded to use 30w fast charge?