Your NuraTrue Pro will automatically use the highest quality audio codec that is supported by the connected device. To experience Lossless Audio over Bluetooth, simply connect your NuraTrue Pro to a source device that supports Qualcomm aptX Lossless. Please check the manual of your source device for compatibility.
Once you have confirmed that your source device offers aptX Lossless your device should send this signal to your NuraTrue Pro automatically. You can compare lossless audio with normal Bluetooth by following these steps.