Plugable 4-Port USB 3.0 SuperSpeed Charging Hub with 20W Power Adapter and BC 1.2 Charging Support for Android, Apple iOS, and Windows Mobile Devices Expand USB connectivity by connecting up to four USB 3.0, 2.0, or 1.1 devices to any USB 2.0 or 3.0 capable computer. Fully plug and play, devices can be hot-plugged, supports USB over-current protection. All four ports support charging (see "Power and Charging" in description for more information on smart charging abilities). Robust 5 volt 4 amp 20 watt power supply included. (US AC Wall Outlet Plug, 100-240V 50/60Hz) Compatible with most Windows 10, 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. Supports USB 3.0 transfer rates up to 5Gbps (640MBps) to allow data to move quickly between devices. Transfer rates are device and USB host controller dependent. Ideal for high-throughput devices such as USB hard drives, flash drives, and USB video adapters. Backwards compatible with all USB 2.0/1.1 devices and hosts. Powerful 5V 4A 20W UL certified power adapter. 4 green LEDs, one per USB port. Sleek piano black glossy finish. All 4 ports on one side to minimize cable clutter and maximize accessability.