Great Flying Companion: Connect the Bluetooth 5.4 transmitter in TX mode and transmit audio signals in an airplane or with TVs that do not support Bluetooth to Bluetooth wireless devices. With a transmission distance of up to 10 meters, transmit hassle-free with no need for knotted headphone cablesSafe Hands-free Calling: Built-in mic for answering calls, it equipped with noise cancellation technology, suppress environmental noise, pick up voices more accurately. One button to answer/hang up calls. This aux to bluetooth adapter also supports broadcasting voice notification from navigation and voice assistants. Provides you with the safety and convenience of hands-free calling while drivingUpgrade Display: The upgraded aux to Bluetooth adapter screen can display the TX or RX mode, the volume, and the remaining battery. Bluetooth transmitter is also equipped with a Type C charging cable and can be fully charged in just 2 hours.Easy to Use: The airplane headphone adapter is simple and easy to set up. Just plug, pair, and play. Connects in seconds. No App or wireless router is requiredBluetooth Aux Wide Compatibility: Bluetooth transmitter receiver is compatible with 3.5mm interface devices, such as airplanes, televisions, car stereos, home stereos, headphones, audio music streaming systems, sound systems, speakers, gym equipment, PCs, MP3, and other devices.