USB 2.0 A Male to Dual Data USB 2.0 A Female + Power Cable USB 2.0 A Female Extension Cable 20cm Connectors: USB 2.0 Type A Male to Data USB 2.0 Type A Female + Power USB 2.0 Type A Female USB 2.0 interface. USB 2.0 Male connector is for USB device,and also for Power charge. USB 2.0 Female is for power and data. Please note: One usb 2.0 Female can not transfer data!