Add four rugged external usb 20 ports from a single usb connection this sturdy industrial grade usb hub can be wall mounted or installed onto a din rail for convenient access to its 4 female usb ports providing a work area server room or industrial area with usb 20 connectivity with support for hi speed usb 20 data transfer rates of up to 480 mbps this 4 port usb hub is backwards compatible with usb 11 specifications and can be powered through the host usb bus or self powered using a three wire