Open your Wireless Network Connection list and follow the steps below to select your device SSID:
For a Windows device:
Left-click Wireless Network Connection on the task bar.
Select the network name (SSID) of your router, click Connect and enter the WIFI key.
For MAC:
Click the AirPort icon.
Select the network name (SSID) of your router from the drop-down menu and enter the WIFI key.
Note: Available settings and menus may vary depending on device model and software version.