Multiple available.

All tested.

For audio on boat

It is compatible with Bluetooth, CD, iPhone, Android, AUX input, WMA, Pandora, and AM/FM radio.

Features: This remote offers features such as volume control, track selection, band adjustment, mute, and preset options.

Durability: The receiver is water-resistant, with a UV-resistant faceplate and a rust-resistant chassis.

Sound Control: It has preset equalizer curves for different music styles.

Motion Control: Some models have motion control technology for adjusting the volume.

Power: It has 200 Watts peak power (50W x 4).

Inputs: It includes a front panel USB input with 1A charging and a 3.5mm Aux input.

Outputs: It has 1 Pair of RCA preamp outputs.

https://www.westmarine.com/on/demandware.static/-/Sites-wm-master-catalog/default/dw70ea68f4/images/legacy-pdf/DualAM75BT_OwnersManual.pdf#:~:text=The%20source%20volume%20level%20control%20allows%20a,level%2C%20press%20AUDIO/MENU%20until%20SRC%20LEVEL%20appears.