How do I connect devices to the AC750 Range Extender using WPS?

You can use WPS with either the push button method or PIN method. For the push button method: log in to the extender web interface, go to Settings > Do More > Connect Devices (WPS), leave 'Push Button' selected, click the WPS BUTTON, then press the WPS button on your device within two minutes. For the PIN method: select 'PIN Number', enter the device's PIN, click NEXT, then use the device's WPS software within four minutes to join the network.