The AIR-J 18W QC3 AC Charger supports the Qualcomm Quick Charge 3.0 standard to offer a total 18 watts of Qualcomm Quick Charge charging for most Qualcomm Quick Charge enabled phones. Note that the charger is using the USB Type-C instead of the typical USB Type-A interface which is more common for Qualcomm Quick Charge 3.0 charging.
Here's a quick look of the AIR-J 18W QC3 AC Charger purchased in Japan. The charger states that it comes with a 1.5 m tethered Type-C cable plug for attaching to Type-C devices on its packaging.
The AIR-J 18W QC3 AC Charger states that it uses 15 watts (5 volts @ 3 amps), 18 watts (9 volts @ 2 amps) and 18 watts (12 volts @ 1.5 amps) power profiles to at most supply 18 watts using Qualcomm Quick Charge.
The AIR-J 18W QC3 AC Charger has foldable AC wall prongs for plugging into a AC wall socket for own power supply.