StarTech 2SD4FCRU3 with SD card USB 3.0 Dual-Slot SD Card Reader/Writer - USB 3.0 - SD 4.0, UHS II Installation Type: External Support - MMC: Yes Support - SD: Yes Slots: Drive Connectors: 2 x SD / MMC Slot Female External Ports: 2 x SD / MMC Slot Female Host Connectors: 1 x USB Type-A (9 pin) USB 3.0 Receptacle Other Interface(s): 1 x USB Micro-B (5 pin) Receptacle Compatibility: OS Compatibility: OS independent; No software or drivers required Memory Media Type: SD/MMC (Secure Digital/Multimedia Card) SDHC (Secure Digital High Capacity) SDXC (Secure Digital eXtended Capacity) Dimensions: 0.50 x 2.70 x 4.20 Color: Black Package Contents: 1 x dual-slot SD card reader 1 x quick-start guide