Inber via Amazon offers the Picun H6 Bluetooth Wireless Headphones in Black/Gold for $20.99. Coupon code "BUQDMIT6" cuts them to $12.59. Plus, Prime members bag free shipping. That's a buck under last month's mention and the lowest price we could find by $7. They feature Bluetooth 4.1 and a frequency response of 20Hz to 20kHz.