A dealmac exclusive! A4C offers the H2O Vibe Waterproof 3.5mm Stereo Headset for $19.95. Coupon code "DEAL75" cuts it to $4.99. With free shipping, that's the lowest total price we could find by $12. This waterproof headset features an inline mic and a button for answering and ending calls. Coupon ends on July 31.