A dual USB port in a Samsung charger refers to a charger that has two USB ports that can be used to charge two devices simultaneously. The charger comes with a detachable USB to Micro USB cable that lets you charge other Micro USB devices. Some Samsung chargers come with a USB and USB-C CLA adapter, and its compact design allows it to fit into most car power sockets. When used separately, the USB-C port provides maximum charging speed for Samsung devices thanks to its 25W Super Fast Charge technology. The USB type-C port lets you harness the power of up to 45W to recharge your device with the incredible speed of Super Fast Charging 2.0. The dual-port charger is powerful enough for double, high output charging of 2 devices simultaneously with its duo USB ports. The charger is compatible with a wide range of devices, including Androids and iOS devices.