USB HUB, Alcey Bus-Powered USB 2.0 3-Port Aluminum Hub with 2-Slot Card Reader Combo ELEGANT DESIGN: Sleek Apple-style design ideal for iMac, MacBook Air, Mac Pro ,MacBook Pro, MacBook, Mac Mini, PCs and Laptops; A large grey rubber pad at the bottom preventing the hub slipping around to ensure stable connection MULTI-FUNCTION DEVICE: Adds 3 USB 2.0 ports and 2-Slot Card Reader to your computer; Supports SDXC (up to 2TB), SDHC, SD, Micro SDXC, Micro SDHC, Micro SD and MMC cards PLUG-n-PLAY FEATURE: Hot swapping; USB-powered (no external power or battery needed) DEPENDABLE BUILD: 2-Foot Shielded Cable makes a safe and efficient data transfer for maximum performance and longtime usage; Built-in Overvoltage / Overcurrent / Leakage and Short-Circuit protection unit COMPATIBILITY: Windows 2000 / ME/ XP / Vista / 7 / 8/10 (32bit/ 64bit ) and MAC OS 10.X or later version