4 port USB 2.0 or 1.1 devices to Compact size and portable. Easily expand by connecting up to your Macbook, Laptop, ultrabook, tablet PC and any USB 2.0 capable computer works with USB. Works with USB extension cable and reverse Compatible with USB 1.1 Designed with a built-in surge protector to keep your devices safe. Plug-and-Play; hot-plugging; driver free. Designed with a built-in surge protector to keep your devices safe

Expand USB connectivity by connecting up to ten USB 3.0, 2.0, or 1.1 devices to any USB 2.0 or 3.0 capable computer. Two flip-up USB 3.0 ports. Fully plug and play, devices can be hot-plugged, supports USB over-current protection. Robust 12 volt 4 amp 48 watt power supply included. (US AC Wall Outlet Plug, 100-240V 50/60Hz) Compatible with most Windows 10, 8.1, 8, 7, Vista, XP, Mac OS X, and Linux / Unix systems. Microsoft Windows systems should install latest manufacturer USB 3.0 host controller drivers and Windows Updates. Apple Mac OS X and Linux / Unix systems require latest operating system updates for best compatibility. Apple notes: Some devices such as the Apple SuperDrive look for Apple-specific signaling and will not work when connected through any USB hub. Not recommended for use with USB 3.0 PCI-e add-on cards for older Mac Pro systems because of limitations in their software support for USB 3.0 hubs.