Easy to Installation: Follow the operation steps to put the hub into the table hole. And it can detach the cable hole so that the big plug of the data cable can be passed through, which is a more user-friendly and practical design. Plug and play and support hot plugging. In addition, the blue LED light can easily show its working status.Desk Grommet USB Hub: Designed for easy access to the ports of a PC on your desktop. You can mount the USB hub on the grommet hole, to make full use of space for desks. And it features 4 USB 3.0 ports, which can be used for data transmission. Connect your flash drive, hard drive, etc.Dustproof and Cover: It can be hide into the table hole when not use by the cover plate insert fits into the outer sleeve to prevent all ports from dust. Cables neatly feed through your desk, work surface, sales counter etc.; It can be swiveled away to allow multiple cables to pass through.Fits 2.36" Standard Grommet Hole: Only fit for 2.36"/60mm standard grommet hole, please make sure your desk hole diameter is 2.36" before purchasing.4 Port USB 3.0 Hub: Instantly expand 4 USB 3.0 ports to your desktop PC, convenient for connecting a flash drive, mobile hard drive, Bluetooth adapter, mouse and etc. syncing data at blazing speeds up to 5Gbps in no time.