The USB cable is a data transmission and charging cable that connects the charger to the electronic device. It consists of a standard USB connector on one end and a connector that is compatible with the device's charging port on the other end. The most common types of USB connectors include USB Type-A, USB Type-B, USB Type-C, and Micro-USB. The USB cable allows the charger to deliver power to the device's battery for charging, as well as facilitate data transfer between the device and a computer or other compatible devices.