Specification:USB standard: USB 3.0 (3.1 Gen 1) SuperSpeed (5 Gbit / s)Compatibility: SDXC / SDHC / SD / MMC / RS-MMC / Micro SD / TF / Micro SDXC / Micro SDHC / UHS-IMaximum supported card capacity: 512 GBOperating systems: Windows XP / Vista / 7/8 / 8.1 / 10/ 11, Mac OS, LinuxPlug & Play, no need to install driversDimensions: 36 mm x 50 mm x 13 mmCable length: 15 cmHe will listen to two cards at the same time