The USB hub is characterized by over-current, over-voltage, and short-circuit protection functions. This USB adapter can easily drive high-capacity hard drives through the 3 USB ports. As this splitter supports simultaneous connection of multiple ports, such as keyboard, mouse, U disk and mobile hard drive, it easily relieves office anxiety. It is constructed of Metal materia It is ideal to use , on working place or during travelling. Features: Stable Transmission, Easy to Carry Multiport Interface Type: USB, USB3.0, 2xUSB2.0 The product appearance and printed words depending on the batch, but this does not affect use Colour:Dark Gray Material:Metal Package Contents: 1 x Docking Station Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.