This 5-pack of 17cm (7in) USB 3.1 (C) male to USB 2.0 Micro female black adapter cables will allow your USB 3.1 (C) equipped MacBook®, laptop or PC to connect to a USB Micro cable such as the ones used for smart phones, MP3 players, GPS devices or any other USB Micro equipped devices. Reversible USB Type (C) makes it easy to connect without having to see which side is up or down.