The USB 3.1 SD & microSD A2 Memory Card Reader from Delkin Devices combines compact size with the ability to transfer data at blazing-fast speeds. Designed with two slots for (1) SD card and (1) microSD card, the reader is perfect for on-the-go users who want to travel light while being able to utilize the full power of their high-speed A2 memory cards. Incorporating a USB 3.1 interface, the reader offers speeds suitable for every level of photographer and videographer. Offload large files, such as high-res RAW images, 4K, 2.7K & Full HD 1080p videos, quickly and efficiently at speeds up to 170 MB/s. Measuring 2.5 in. long and weighing less than ¼ lb., the reader provides convenient, hassle-free portability. Bring it with you wherever you go; safely store it in a backpack, carrying bag, laptop case, and much more! In addition, the reader's retractable telescope design avoids the need for a separate protective end cap. Simply slide the front half back to reveal the USB connector, then back forward when done using in order to protect the USB connector. No drivers or external power is required; simply plug the reader into any USB-A or USB-C port on your computer (separate USB Type-A Female to Type-C Male adapter cable included) and start viewing your photos and videos instantly. The reader is also backwards compatible with USB 3.0, 2.0 and 1.1 ports, but will transfer data at slower rates.