Holigoo Direct via Amazon offers its Holigoo Wireless Bluetooth Headphones in Black for $24.99. Coupon code "JZA5GG4M" drops it to $14.99. Plus, Prime members bag free shipping. That's $45 off list and the lowest price we could find. They feature Bluetooth 4.1, playback time up to eight hours, and are heatproof and sweatproof.