Best Buy offers the EcoXGear Ecostone Bluetooth Waterproof Speaker in several colors (Black pictured) for $79.99 with free shipping. That's $20 under our mention from last July the lowest price we could find today by $63. It floats in the water and features an LED flashlight, 2,800mAh battery that charges smartphones and tablets, 1/4" camera style threading mount, and speakerphone function.