Travel-friendly design: This mini Bluetooth transmitter with a 3.5mm audio port is perfect for use on any plane, allowing you to enjoy your favorite movies/TV shows through wireless headphones.Make your traveling experience hassle-free and enjoyable | Safe hands-free calling: The built-in mic with noise cancellation technology suppresses environmental noise and picks up voices accurately. This aux to Bluetooth adapter also supports broadcasting voice notifications from navigation, providing you with the safety and convenience of hands-free calling while driving | Long battery life: Enjoy up to 14 hours (TX 11H/RX 14H) of audio playback with this Bluetooth transmitter. Charge it via USB-C port for speedy charging and convenience at any time | 2-in-1 Bluetooth Transmitter & Receiver: This device can be used as a Bluetooth transmitter in TX mode, transmitting audio to Bluetooth headphones/speakers from non-Bluetooth devices such as TV/PC. In RX mode, it can be used as a Bluetooth receiver, receiving audio from smartphones or tablets and playing it through wired speakers/car stereos/home sound systems | User-friendly plug-and-play design: Simply long-press the power button to turn it on and automatically pair with your Bluetooth devices. Ensure seamless operation by ensuring your Bluetooth device is not paired with another device.The working range extends up to 33ft for added convenience