Cambond via Amazon offers its Cambond Bluetooth In-Ear Headphones in Black or Blue, model no. EPS01, for $22.99. Coupon code "HVIV86ZB" cuts that to $19.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, it costs an extra $5.99.) That's $2 under last month's mention, $50 off, and the best price we've seen. These waterproof and sweatproof headphones feature Bluetooth 4.1, up to a 32-foot range, in-line controls, microphone, dual rechargeable lithium battery with up to 10 hours of playback per charge, adjustable tangle-free wire, flexible ear hooks, and three earbud sizes.