The QuantumZERO™ USB 3.0 Card Reader with unique quadrangle design and integrated 14 cm USB 3.0 cable enhances portability. The SuperSpeed USB 3.0 interface enables you to transfer data at incredible rate up to 5Gbps. Product Features: Equipped with Genesys GL3220 controller for best performance and wider compatibility. Enhances portability with built-in 14 cm USB 3.0 cable. Cool LED light - green and red indicating USB 3.0 and USB 2.0 transfer modes respectively. Plug and Play, Supports hot swap, Bus-powered. SuperSpeed data transfer rates up to 5 Gbps (actual rates depend on speed of memory card itself and computer USB host controller). Backward compatible with USB 2.0, USB 1.1 at their native speed - USB 2.0 Hi-Speed devices (rates up to 480Mbps), and USB 1.1 Full/Low Speed devices (rates 12/1.5 Mbps). Product Specifications: Product Name: USB 3.0 Card Reader Product Model: QZCR02 Cards Supported: SDXC (up to 2TB), SDHC, SD, CF, High-Speed CF(UDMA), MS, M2, Micro SDXC, Micro SDHC, Micro SD cards. High-Speed MS (HX), supports the latest UHS-I specification Card Reader Controller: Genesys GL3220 Output Interface: USB 3.0 Dimensions: 58 x 58 x 10 mm Weight: 62 g System Supported: Windows 10/8.1/8/7/Vista/2003/2000/ME/XP/98, Mac OSx10 or above Color: Black Driver: No need, Plug and Play Package Contents: QuantumZERO™ USB 3.0 Card Reader Welcome Guide Special Notes: Older versions of Windows XP or Mac OS X may need to install operating system upgrades or patches to support the exFAT file system of many high capacity cards (64GB or higher). Always follow the safe ejection procedure – ‘Safely Remove Hardware and Eject Media’ on Windows taskbar, similarly on Mac - to prevent data corruption. High-speed memory cards, such as SDXC, CF (UDMA), Micro SDXC, HX MS, etc., are able to take full advantage of the USB 3.0 card reader’s transfer rate capability. Certain memory cards may not be readable on some older operating systems, so please make sure your OS has been updated. Also, please check the lock setting on your memory card to make sure it isn’t locked for reading.