AnkerDirect via Amazon offers its Anker SoundCore Sport Water/Dust-Proof Bluetooth Wireless Speaker
, model no. AK-A3182011, for $29.99. Coupon code "NKJTGELK" cuts it to $26.99
. Plus, Prime members bag free shipping
. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $8.32.) That's $30 off list and the lowest total price we could find. It features a built-in micrphone, 3-watt driver, passive subwoofer, 10 hours of playtime per charge, and 33-foot range.