The Efficient Dual SD/TF Card Reader & Holder is a high-speed, compact device designed for efficient data transfer with a rate of 312 Megabytes per second. It is compatible with various brands including SD, MicroSD, and UHS-I. The card reader is suitable for use with smartphones, tablets, laptops, action cameras, drones, and other universal devices. With a sleek black design and USB Type-C connectivity, this card reader is a convenient and versatile accessory for managing multiple memory cards effortlessly. New, in opened box.