eCase via Amazon offers the Kmashi Bluetooth 4.0 Portable Speaker, model no. Arma-K6, for $29.99. Coupon code "VP7TIUC8" cuts it to $19.99. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.87.) That's $50 off and the lowest total price we could find. It features a Bluetooth range of up to 33 feet and four LED visual display modes. Deal ends September 30.