The new Type-C Alternative Mode allows the USB cable to carry different types of signal, including native DisplayPort capable of 4k resolution video. 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 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.