A 3-in-1 USB cable typically includes multiple connectors for various devices and their charging ports. Here is a brief overview of the connectors you may find on a 3-in-1 USB cable: USB Type-A, Micro USB, USB Type-C, and Lightning. USB Type-A is the standard connector used for power or data transfer. Micro USB is commonly used for older Android devices and some electronics. USB Type-C is a newer standard known for its reversible design and faster data transfer and charging capabilities, while Lightning is used for Apple devices.