USB 3.0 Male is for USB Devices, Two USB female connector, One is for USB 3.0 power and data, another one for USB 2.0 power only. USB 3.0 A power adapter Y cable allows for power to be taken from 2 USB ports and solve issues as one USB port unable to supply sufficient power.
Note: USB 2.0 Female can not power IOS devices. USB 3.0 data transfer speed up to 5Gbps, just plug and play, easy to use. USB 3.0 A male to USB 3.0 female and USB 2.0 Female. Suitable for power lights, PC. Notebooks, etc.