How to connect an old stereo to a mobile phone

If the old stereo has an audio input (usually a lotus socket), it can be connected to the amplifier with a Bluetooth board. The method is as follows:

1. Go to a treasure to buy a Bluetooth board first, as shown in the figure:

2. Use the mobile phone battery to supply power separately, then fix the Bluetooth board with adhesive, and turn on the battery, as shown in the figure:

3. Weld several wires according to the label on the board, and then connect them to the amplifier with an earphone plug audio cable.

4. Operation method: Turn on the stereo, turn on the power of the Bluetooth board, and then click Bluetooth device connection in the phone settings bar. Turn on the Bluetooth function, and after the pairing connection is successful, you can play music on your mobile phone, and the stereo will make beautiful music.