The black Rocstor USB-C 2.0 Male to USB-A 2.0 Female Adapter connects your legacy USB-A computer or device to the newer USB-C devices. The adapter is seamless and simple to use. Just plug the USB-C end of the adapter into your computer with a USB-C port, then attach the USB-A 2.0 end into your device or accessory with USB-A 2.0 port. The adapter is ideal for MacBooks and other USB-C devices and is RoHS compliant.