GTrusted

The OPPO 30W VOOC 4.0 AC Charger ​was originally shipped with the OPPO K5 to keep the phone charged. This USB Type-A based charger supports OPPO's own brand of VOOC Flash Charge 4.0 charging scheme for up to 30 watts (5 volts @ 6 amps) output. For fastest charging, make sure to use the supplied USB Type-A to Type-C cable when connecting the charger to the phone.

The OPPO 30W VOOC 4.0 AC Charger also supports USB Power Delivery (PD) over Type-C based charging for the OPPO K5 but only up to 10 watts (5 volts @ 2 amps) so that USB PD is purposely made much slower charging than VOOC.