extend function: designed to extend the connection between computer, laptop, keyboards or cameras which equipped with usb type a port. high speed: usb 3.0 a support data transfer speeds up to 5 gbps,10 times faster than usb 2.0. fast charging speed up to 3a current max. universal compatibility: suitable for usb hub, printer, card reader, bluetooth adapter, flash drive, hard drive, mouse and more with the usb ports. transmission stability: gold-plated connectors ensures maximum conductivity and minimum data loss. plug and play, no driver needed. worry-free warranty: one-year hassle-free warranty and lifetime friendly customer service.