JBL Tour One M3 Smart Tx delivers all the powerful features of the Tour One M3 headphones such as world class noise cancellation, crystal clear calls and legendary Hi-res certified JBL Pro Sound. The Smart Tx audio transmitter connects you to almost any audio source and elevates your wireless experience. Connect wirelessly to digital devices using the USB-C connection, or analog devices with a 3.5mm audio jack, such as in-flight entertainment systems. No need to pull out your phone and search for the app. Full access to all controls is right there on the touch screen of the transmitter.