Range extenders as the name suggests are used when you want to extend the range of your Wi-Fi. Here are the steps for setting up Netgear N300 Wi-Fi range extender. Plug in the extender. Connect your device to the Wi-Fi range extender. Go to a web browser and type mywifiext.net or 192.168.1.250 in the URL section. Then, click on new extender set up. Log in through the default credentials and then you can change them. Select the range and then click on next to complete the set up.