Zenotus via Amazon offers the Brisario Bluetooth In-Ear Wireless Headphones for $30.99. Coupon code "8HJE8AHO" drops it to $15.49. With free shipping, that's $16 off list and the lowest price we could find. These sweatproof headphones feature Bluetooth 4.1, inline microphone, and up to eight hours of playback. Deal ends June 30.