Usb-c connected to tablet computers, desktop computers, charging head into ordinary USB 3.0 female port, use this adapter to expand your USB-C port, USB-C Type-C port into USB 3.1 Type-A interface, Connect USB-C port with external display, flash memory, keyboard and a variety of peripherals or separate slow 5V charging, bear on the MacBook PRO measured normal conversion, can reach 10G USB 3.1 speed (this to your external device support, a 2.0 device can only run 2.0 attention), The test on the iPhone 15 mobile phone is also normal work, access with a protective case of the mobile phone just does not jam, do not remove the case can be used, more convenient.