2-in-1 Bluetooth Transmitter Receiver: This Bluetooth adapter can be used in 2 modes. In TX mode, you can use the Bluetooth transmitter to connect non-Bluetooth audio sources such as airplanes, TVs, or MP3 players to Bluetooth-enabled AirPods or headphones. In RX mode, the Bluetooth receiver allows you to connect your smartphone to wired speakers, earphones, car stereos, or home stereos wirelessly via Bluetooth. It can simply upgrade and modernize old audio equipment | Easy to Set Up and Dual Link:No more complicated operations, the wireless Bluetooth adapter can be paired easily. Just turn on the device and choose the mode you need, double click"P/R" button to enter the pairing mode, and it will be quickly connected. The A19 Airplane Bluetooth Transmitter supports connecting 2 AirPods or Bluetooth headphones simultaneously. Note:please turn off the unrelevant Bluetooth devices to avoid interference | Bluetooth 5.4 Qualcomm Chip: Built-in the latest Bluetooth Qualcomm Chip, the A19 audio transmitter has a more stable and reliable connection which works perfectly with TVs and airplanes. What is more, the 3.5mm Bluetooth transmitter features Adaptive aptX HD and aptX-Low Latency tech and therefore you'll get high-quality audio transmission with minimal delay. | 24H+ Playing Time: No more worries about the working time. With the 260mAh strong battery capacity, the Bluetooth transmitter can provide a 24-hour working time for long-distance flights. It comes with a Tpye-C charging port that is easy to charge. The Bluetooth transmitter only takes 2 hours to charge and can be used for the whole day | Wide Compatibilities: With the dual 3.5mm Airplane Headphone Adapter included, the A19 wireless audio adapter is compatible with most airplanes, regardless of the audio output jack type. It also works seamlessly with any device that outputs audio via AUX, such as tablets, PCs, gym equipment, and more