Slim USB-C to USB Micro-B Connector Adapter USB 2.0 – Portable. Slim USB-C to USB Micro-B Connector Adapter USB 2.0 – Portable. Rocstor Premium USB-C to USB Micro-B provides you a quality adapter that enables you to connect an existing USB Micro-B cable between the USB-C port on your MacBook, MacBook Pro, computer, laptop or tablet and a USB-A host port. The Rocstor stylish slim adapter allows you to sync and charge your USB-C device without an additional expense of purchasing a USB-C cable.This adapter supports USB 2.0 data transfer speeds up to 480 Mbps. The reversible USB-C male connector plugs into a USB-C port in either direction. Use your Rocstor premium cable Worry free which is backed by Lifetime Limited Warranty.