Aukey Direct via Amazon offers Prime members the Aukey Bluetooth 4.1 Headphones, model no. EP-B4, for $29.99. Coupon code "DZA6QDSI" cuts them to $19.99. With free shipping, that's $40 off list and the lowest total price we could find. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.18.) They weigh only 1.7 oz. and feature a range of up to 33 feet, up to four hours of playback, rechargeable battery, and interchangeable ear buds and ear hooks in a variety of sizes.