This may refer to the fact that your phone supports a wired fast charge of up to 33 watts, while the wireless fast charge supports 30 watts. Each mobile phone has a power management chip, and wired fast charge is wired, after all, he through the data line to charge into your mobile phone, and wireless, is your mobile phone inside a coil, wireless charger is also a coil, he through the coil electricity generated magnetic, and then by the way of magnetic electricity charged into your mobile phone.
Support 30W wireless fast charging: the wired charging power of Xiaomi 10S reaches 33W, and the charging speed does not open the gap with the Redmi K40 series. However, it supports wireless fast charging, which is more convenient to operate