The QuantumZERO USB 3.0 Card Reader enables you to transfer data at a blistering speed of up to 5Gbps, saving your time. Product Features: equipped with Genesys GL3233 controller for best performance and wider compatibility. SuperSpeed data transfer rates up to 5 Gbps (actual rates depend on speed of memory card itself and computer USB host controller). Made of high grade ABS plastic for durability. Soft, cool blue LED light indicates operation. Plug and Play, Supports hot swap, Bus-powered. 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: QZCR01. Cards Supported: SD-XC (up to 2TB), SD, MMC, RS-MMC, SD-HC, Micro SDHC, Micro SDXC, Micro SD, Mini SD* (* for Mini SD adapter is required, adapter not included) supports the latest UHS-I specification. Card Reader Controller: Genesys GL3233. Built Material: High Grade ABS Plastic. Output Interface: USB 3.0. Dimensions: 74 x 28 x 13 mm. Weight: 20 g. System Supported: Windows 10/8.1/8/7/Vista/2003/2000/ME/XP/98, Mac OSx9 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). High-speed memory cards, such as SDXC, Micro SDXC, 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.