SmartOmi via Amazon offers its SmartOmi Wireless Bluetooth 4.2 Earbuds for $39.99. Coupon code "BMJKT5FP " cuts that to $33.19. Plus, Prime members receive free shipping. These sweatproof earbuds feature a built-in microphone, rechargeable battery with up to five hours of runtime per charge, and three sizes of eartips. Deal ends November 15.