1.used to connect the usb device like keyboard, mouse, card reader, flash disk.can't work for usb ethernet, usb wireless, usb video, usb audio or sim card.
2.Fit for the standard USB 2.0 or USB 3.0 interface, not the thin one.
3.Used in OTG android phones / tablets.Make sure your phone support OTG function.
4. package included 5pcs