Something like this: https://www.amazon.com/Retekess-Portable-Earphone-Digital-Rechargeable/dp/B019BYBR48 https://www.amazon.com/Retekess-Portable-Earphone-Digi

Something like this: https://www.amazon.com/Retekess-Portable-Earphone-Digital-Rechargeable/dp/B019BYBR48 https://www.amazon.com/Retekess-Portable-Earphone-Digital-Re... And a FM transmitter is what I would go for.