Innovaa via Amazon offers its Innovaa Outdoor and Shower Waterproof Bluetooth 4.0 Speaker in Black for $29.99. Coupon code "YQSVWEVD" cuts it to $17.99. Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.59.) It features a carabiner hook, microSD card slot, and auxiliary 3.5mm line in. Deal ends March 29.