Good grief so many politically correct riders! I use aa Bose® - SoundLink® Mini Portable Bluetooth Speaker connected to my Galaxy Note 4. I found a bag which fits to exactly and attaches to the bar running between the stem and the fork. I don't ride with others.
Rich
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..life is like a roll of toilet paper. The closer it gets to the end, the faster it goes. ― Andy Rooney ...enjoy what's left!