Anker&reg; Uspeed USB 3.0 4 Port Compact Hub with Power Adapter and USB 3.0 Cable - Matte Black, VIA VL812 Chipset, 18 Months Warranty Super Speed USB 3.0 supports transfer rates up to 5 Gbps and is backward compatible with USB2.0/1.1 - The actual transmission speed is limited by the setting of the device connected. Supports hot swapping. No install driver needed. 4 ports with current overload detection and protection function. Plug and play. It also supports USB bus power when connects with a power adapter. Automatic switch between self-powered and bus-powered mode. Built-in LED indicator show the USB and DC power supply status and connection state of attached USB peripheral devices. Ships next business day - 24  7 email support - Free lifetime technical support and 18-month warranty from Anker Uspeed.