BassPal via Amazon offers the BassPal SoundRo X3 Waterproof Portable Bluetooth Speaker for $29.99. Coupon code "I8DX8TDI" cuts it to $14.99. With free shipping, that's tied with our mention from three days ago and the lowest price we could find by $21. It features Bluetooth 4.2, 24 hours of playback time, and a microphone. Deal ends June 30.