Dear Customer, We apologize for any inconvenience caused. The X2 only supports 24G WiFi. 5G WiFi is currently not supported. Regarding Bluetooth device pairing: During pairing, you should see two Bluetooth pairing options: BLE and BT. Either can be selected. If you cannot locate Sofabaton in your Bluetooth device list, try restarting the device. Additionally, if your Bluetooth device is paired with other Bluetooth remotes or devices, we recommend unpairing them first before attempting to pair again. Regarding the V5 upgrade prompt upon entering the app: V5 is the hub's version, which is a new release launched today. The upgrade prompt during initial remote setup refers to the remote's version. Currently, both the remote and hub are at the latest V5 version.