Extends one USB 3.0 port into four independent USB 3.0 interface. Supports four mobile hard drive working at the same time - USB power supply - SuperSpeed USB 3.0 transmission rate up to 5Gbps - Compatible with USB 2.0 / USB 1.1 - Supports hot swapping - Over load current detection and protection function - Built-in LED indicator to display USB power supply DC power supply USB external connections - Without any install software needed - Application: Mobile hard disk / U disk / card reader / mouse / keyboard / Phone / Tablet / MP3 / MP4 / voice recorder and other USB devices