After looking at this product, it does not support coaxial.

It comes with AUX input and no Bluetooth;

It can be connected to a mobile phone and used as a speaker.

You need a 'single-to-single 3.5MM audio cable', as shown in the picture below, it is a cable with 3.5mm plugs on both ends, and it costs a few yuan.

The coaxial part of MX2 is connected to the power amplifier at home