For the Setup and configuration of your Rockspace Extender AC750 Mbps, you need to use a laptop or a computer to perform http //re.rockspace.local process. You may even utilize a cell phone for the same purpose. A cell phone has a limitation that it can only be connected through the wireless WIFI gateway as it does not have any LAN or WAN port to connect via an Ethernet cable. After connecting the devices, turn them on and check the LED status also.