The charger supports up to 67W fast charging. If your Xiaomi phone has 67W charging function, the charger will automatically match 67W fast charging. If your Xiaomi phone has a 55W charging function, the charger will automatically match the 55W fast charging.Backward compatibility, and so on.
If your mobile phone or device is not Xiaomi brand, the charger will automatically match 18W-27W fast charging.