The DK1 Pro allows your device to use USB Audio output while charging, solving the issue of not being able to listen to music on smartphones and portable music players while being charged. The dock also contains a charging switch for greater compatibility with various devices. (For devices that cannot output USB Audio while charging please flip the Charge switch to OFF) Furthermore, there are 3 Type-C ports on the dock. In addition to a power supply port and a USB port, you can also plug in a mobile storage device like a USB flash drive The curved aluminium alloy backrest design is not only stable and durable but is also designed to make using it comfortable. The angle-adjustable base makes it easier to plug and unplug the device, while the non-slip silicone pads on the backrest and the base ensure your device stably remains on the dock and prevent accidental marks. These small, yet important design touches are there to make using the dock more enjoyable.