LightInTheBox offers the Xiaomi Mini Square Box Wireless Bluetooth Portable Speaker in Black for $15.89. Coupon code "MISPEAKER" drops that to $13.89. With free shipping, that's the lowest price we could find by $14. It features a metal casing, Bluetooth 4.0, and 2-way audio. Note: This item ships from China and is expected to take up to four weeks to arrive.