Here all the information that you should know about USB 4 and the current specifications. It has two lanes of traffic for connected devices and it's backward compatible.
With speeds from 10 to 40 Gps, it's going to be a plus for new devices to charge faster. USB 4 will not disappoint users when it arrives late this year.
Link
With speeds from 10 to 40 Gps, it's going to be a plus for new devices to charge faster. USB 4 will not disappoint users when it arrives late this year.
Link