Features: USB2.0 interface, stable transmission, the theoretical transmission speed up to 480Mbps, easy to transfer pictures, videos and large files. TF+SD dual-slot design, to meet your different needs.(Note: TF and SD cards cannot be read at the same time) Maximum support 2TB memory card.(The memory card is not included) The protective cover effectively protects USB interface from damage, extend service life. Simple appearance, lightweight design, not occupy space, easy to carry and use. Widely compatible with UAV, sports camera, surveillance device, digital camera, SLR camera, driving recorder, etc. Specification: Type: USB2.0 card reader Brand: Lenovo Model: D221 Interface: USB2.0 Theoretical transmission speed: Up to 480Mbps Card slot: TF, SD(Simultaneous reading is not supported) Maximum supported capacity: 2TB System requirement: Windows XP/7/8+, Mac OS X 10.5+, Linux 2.4.x+ Item size: 7 * 1.85 * 1.05cm /2.76 * 0.73 * 0.41in Packing list: 1 * Card reader