USB3.1 (also called Gen.2) brings many improvements to the previous standard USB3.0 (Gen.1). The most noticeable is the new Type-C connector which is much smaller than the previous standard connectors, it is also reversible.
Type A to Type C
This cable features both a Type-A connector and a Type-C connector making it the perfect solution for connecting modern mobile devices with a Type-C connector to a PC that doesn?t have a Type-C connector yet.
USB Power Delivery v2.0
The USB3C-901 supports up to 20V / 3A (60W) of power. The new improved power delivery allows you to charge not only small mobiles devices such as mobile phones and tablets, but also higher voltage devices, such as suitably enabled laptops.
The new USB Type-C connector is smaller than most of the previous USB connectors. (Micro B is the exception.) It is also symmetrical; this allows you to plug the connector in either way up.