Ibiza sound WIFI12A Manuel D'instruction page 6

2.3 Connect WIFI speaker under Wlan home WIFI
2.3.1 Your phone will search Wi-Fi speaker signal, just connect it.
2.3.2 Run the app, the device will be found and start working.
2.4 Connect WIFI speaker when Wlan home WIFI is not available
When Wlan home WIFI is not available, you can connect the Wi-Fi signal of the speaker via following steps.
Click '+' on the device list. Proceed as for the first connection.
When the device has been added, you can see the new device in your list, as shown below: