Lenovo D231 Multifunctional USB3.0 Card Reader SD+TF 2-in-1 Card Reader High-speed Transmission ABS Shell Wide Compatibility Features: USB3.0 interface, high-speed transmission, the theoretical transmission speed up to 5Gbps, reducing waiting time. SD+TF dual-slot design, to meet your different needs.(Note: TF and SD cards cannot be read at the same time) ABS shell, wear-resistant and scratch-proof, solid and durable. The protective cap effectively protects USB interface from damage, extend service life. Maximum support 2TB memory card.(The memory card is not included) Widely compatible with UAV, sports camera, surveillance device, digital camera, SLR camera, driving recorder, etc. Specification: Type: Lenovo USB3.0 card reader Model: D231 Interface: USB3.0 Theoretical transmission speed: Up to 5Gbps 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin