HiRO H50229 3-port USB 3.0 Hubs 10/100/1000 Gigabit Ethernet Adapter 5V 4A 20W Power Adaptor Windows 10 8.1 8 7 32-bit 64-bit Mac OS X 10.6 to 10.10 Compatible True 5V 4A Power Adaptor provides full power for each USB 3.0 port Extra 3 USB 3.0 ports to connect other USB 2.0/3.0 peripherals Compliant with USB 3.0 , USB 2.0 specifications Extra 3 USB 3.0 ports to connect other USB 2.0/3.0 peripherals Compliant with USB 3.0 , USB 2.0 specifications True 5V 4A Power Adaptor provides full power for each USB 3.0 port Supports all USB 3.0 power saving modes (U0, U1, U2, and U3) Supports IEEE 802.3az (Energy Efficient Ethernet)