Brand New item comes in generic packaging. 

SAMSUNG 25W USB-C Super Fast Charging Wall Charger - White 

This Samsung wall charger with 25 Watt Super Fast Charge capability to provide the most efficient charge possible. 
Plug into any standard wall outlet via the include AC adapter. The Super Fast charger delivers up to 3 Amp to give your phone power at a much faster rate than your standard 1A or 700mA charger.

A detachable USB-C to USB-C cable is included, so you can charge your phone from any other USB-C power source such as your computer or a portable battery.