is not
vivox21a original charger, belongs to the double engine fast charging head, the input AC range is wide, 100 to 240v can work normally, the output USB interface, output 5v2a and 9v2a two voltages, when ordinary mobile phone charging, automatic output 5v2a charging. x21a mobile phone connection, less than 80 percent charge higher than 20 percent, will be 9v2a 18w power fast charging
No, vivo X21 mobile phone does not support wireless fast charge, so it is not possible to use wireless fast charge function. This model supports dual engine flash charge, you can enter the phone Settings - battery - dual engine flash charge - After opening the dual engine flash charge, you can use the flash charge function to quickly charge.