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.