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Amazon.com has Skullcandy Barricade Bluetooth Wireless Portable Speaker, Black on sale for $ 18

https://www.amazon.com/gp/product/B01DWHPUVQ/

[list][*]Delivers seamless integration with any Bluetooth-enabled device[*]Skip the cord and listen Longer with up to 8 hours of rechargeable battery life[*]A 10W speaker and dual passive radiators work in concert to create powerful, dynamic sound with impressive low end bass[*]A rugged design that’s impact resistant, buoyant, and IPX7 waterproof up to 3-feet Underwater