You can charge multiple devices at the same time via 1 socket with a USB charging station. It's useful if you have a charging station for multiple phones on your desk while you work. That allows you to charge your personal phone, business phone, and headphones at the same time. Use the oval USB-C port to quickly charge your iPhone, iPad, and Samsung smartphone via Power Delivery. You can quickly charge your Android smartphone via Quick Charge in the rectangular USB-A port. After charging for half an hour, the battery of your device is charged for 50%. Devices like e-readers and earbuds can't fast charge. You can charge these at a regular speed in the multi USB charger.