Two USB male connectors, one for USB 3.0 and data, the other for USB 2.0 only. Is one USB port not enough for your USB devices? Our simultaneous USB 3.0 adapter Y-cable is the solution. Our cable allows to draw power from 2 USB ports, such as a PC and an external hard drive. Allows you to link 1 USB device to 2 USB ports on your PC for more functionality. You may have an external device, such as a portable 2.5 hard drive, and a standard USB cable cannot transfer enough data to operate the device. This problem can be easily solved with this USB 3.0 y-cable Length: 30cm Color: Black Material: Plastic Package Contents: 1 * Y-cable Extension Cable Above package contents only, other products are not included. Note: Light and different monitors may cause the color of the item to be slightly different from the actual item. The measurement allowable error is +/- 1-3cm.