Note: The USB 2.0 male connector can only be used for charging and does not support data transmission. The USB 3.0 male head is used for data transmission and charging. Size:(33CM/13inch) Colour:(Black ) Package Quany:(1packs) Features:USB 3.0 Female to USB 3.0 & USB 2.0 Male Data Y Splitter Charger Extension CableFunction: USB 2.0 Female is for all USB Devices; USB 2.0 Male is JUST for Power Charging , USB 3.0 male is for Data Transfer&Power Charging.Connectors: USB 3.0 Type A Female + Power/Data USB 3.0 Type A Male + Power Only USB 2.0 Type A MaleThere are times you may have an external device, such as a portable 2.5 hard drive, and a standard USB cable is not able to transfer enough power to operate the device.Our Sync USB 3.0 Power Adapter Y cable for your is the solution. Our cable allows for power to be taken from 2 USB ports, like a PC and External hard drive.USB3.0 SuperSpeed compatible with Allowed to be connected to USB 2.0 or USB 1.1 ports, one cable with multipurpose. Please note that this cable could NOT support two devices sync data with one PC in the mean time