Increase productivity with Lexar Multi-Card 2-in-1 USB 3.1 Reader. For SD and microSD cards, the Lexar Multi-Card 2-in-1 USB 3.1 Card Reader has transfer rates of up to 312MB/s (reads up to five times faster than USB 2.0). Additionally, it is UHS-I backwards compatible (up to 170MB/s), greatly enhancing your workflow. Time-saving simultaneous file transfers The versatility of the Lexar Multi-Card 2-in-1 USB Card Reader is further increased by its capacity to read simultaneously from both card slots and by facilitating simple file transfers from one card to another. Both USB 3.1 and 2.0 compatible The Lexar 2-in-1 card reader is built with a USB 3.1 interface, although it is also compatible with USB 2.0 ports. In order to guarantee performance, quality, compatibility, and dependability, all Lexar products are put through a rigorous testing process in the Lexar Quality Labs, facilities with tens of thousands of various cameras and digital devices Features High-Speed Transfer SD and micro SD USB 3.1 Gen 1 Plug and Play Specifications Interface: USB 3.1 Gen 1 Operating Temperature: 0 °C to 40 °C (32 °F to 104 °F) Storage Temperature: -10 °C to 50 °C (14 °F to 122 °F) Dimension (L x W x H): 38.2 x 63.9 x 15.3 mm / 1.50” x 2.51” x 0.60” Weight: 15.8 g / 0.034 lbs System Supported: SD, SDHC, SDXC, microSD, microSDHC, microSDXC, and SD/microSD UHS-I and UHS-II cards Supported card formats: SD, SDHC, SDXC, microSD, microSDHC, microSDXC, and SD/microSD UHS-I and UHS-II cards Warranty: 2 year limited warranty