Function use to connect a portable media device with usb 30 5 pin to a pcmac desktopnotebook for data transfer product features double foil shielding to minimise rfiemi distortion 50gbs high speed data transfer flexible pvc cable jacket and strain relief high powered charging use to connect a mobile phonedigital cameraexternal hard drive with usb 30 5 pin to a pcmac desktopnotebook via usb 30 a port for data transfer usb 30 is also compatible with usb 20 ports but data transfer