The BT models combine the superior components, coverage and clarity of the standard ZLX models with the latest Bluetooth technology to deliver the lowest-noise, highest-fidelity streaming experience in their class. Now Streaming: Cut through the competition with Bluetooth enhanced ZLX portable loudspeakers. ZLX portable loudspeakers offer the best performance and reliability in their class - with components and engineering that work together to make it quicker and easier than ever to take contro..