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Productech via Walmart offers the Treblab N8 Wireless Bluetooth Headband Earbuds for Black for $19.97 with free shipping. That's the lowest price we could find by $9. They feature:

20Hz to 20kHz frequency response

8.2mm drivers

waterproof and sweatproof design

8-hour battery life

microphone

Bluetooth 4.0 with 33-foot range