I have above bought in California when I lived there. Back in europe and plugged in with a 240V powwer source - switched on fine and is recognised by laptop but will not connect with a french livebox router?
also can one connect two boosters to same router?
You may want to factory reset the extender by holding the reset button for 10 seconds then try the setup again. And yes you can use more than one and it is recommended to have separate SSID for each one.