EC Technology via Amazon offers its EC Technology Portable Bluetooth Speaker for $19.99. Coupon code "4DWNA8LV" cuts it to $9.99. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.49.) That's $19 off and the lowest price we could find. Features include IPX5 water resistance, noise-canceling microphone, 30-foot range, built-in rechargeable battery, 6 to 10 hours of playback time, and a micro USB charging cable.