"EdimaxEXT" sounds like it could be the default or a custom name for a Wi-Fi extender made by Edimax, a company known for its networking products.
Once the light indicator shows a solid connection, you can unplug the extender and move it to your desired location. Troubleshooting EdimaxExt Setup edimaxext
You may be prompted for a username and password. The default credentials for most Edimax extenders are: admin Password: 1234 (or sometimes left blank) 5. Running the Configuration Wizard "EdimaxEXT" sounds like it could be the default