Tusbiko via Amazon offers its Tusbiko Mini Bluetooth Wireless Earbuds in Black or White for $39.88. Coupon code "H3QD2MZM" knocks it to $19.94. With free shipping, that's tied with last week's mention from five days ago, $20 off list, and the lowest price we could find. These IPX7 waterproof earbuds feature up to four hours of talk/listen time after a 1-hour charge. Deal ends August 19.