Specification: Product name: 4-port USB HUB
Size: about 2.9*1.9 (in)
Material: ABS
USB ports: 4
Colour: Black
Transmission interface: USB3.0, USB2.0 Transfer rate: USB 3.0 port up to 5Gbps
Operating system: Win95/98SE/Me/2000/XP/7/8/10/vista, Linux, Mac OS 8.5 and above.
Package Contents: 1 X 4 port USB hub