Certain variants of MA770 still support Bluetooth connectivity.
To play music via Bluetooth, first select BT as the speaker's source. Once selected, the BT light will pulse indicating it is ready to pair. Enable Bluetooth on your mobile device and then select the speaker as the device to complete the pairing. The BT light will remain lit once the pairing is complete. Press Play in your preferred music streaming application.
Note: The speaker's source must be set to BT in order for it to be discoverable within the Bluetooth settings on your mobile device. The speaker and your mobile device will not auto connect.