Inger Store via Amazon offers the Yuwiss Bluetooth Earpiece Headset for $21.15. Coupon code "4KTE5GCA" drops it to $17.98. Plus, Prime members bag free shipping. That's the lowest price we could find by about $8. It features up to 300 hours of standby time, 20 hours of talking time, and is compatible with iOS or Android devices. Deal ends October 16.