The audio system on the Birthday Tiki is controlled entirely by a Bluetooth connected smart phone. To connect a smart phone to the system, first turn the system on by switching the black rubber toggle switch, located under the helm to the right, to down position. Once the system is on CONNECT the smart phone to the FUSION MS-BT100 broadcast via Bluetooth. Once the phone is connected the source and volume is controlled by entirely by the connected smart phone. Please remember that only one phone can be connected at a time to the system.