Ugreat via Amazon offers the HopDay Bluetooth Sport Headphones in Black for $19.99. Coupon code "JZUGM6G2" cuts that to $7.98. Plus, Prime members bag free shipping. That's $12 off and the lowest price we could find. These sweatproof headphones feature Bluetooth 4.1, a noise-cancelling microphone, and rechargeable lithium battery with up to seven hours of music per charge. Deal ends February 28.