2-in-1 Bluetooth Adapter - This Bluetooth transmitter and receiver features TX and RX modes. In TX mode, your TV can establish a direct connection with wireless Bluetooth headphones, so you don't have to worry about disturbing your family. In RX mode, your ordinary stereo is instantly upgraded to a Bluetooth speaker, eliminating the need for cables. 3 Playback Modes - This Bluetooth audio adapter supports 3 playback modes, including Bluetooth, U-Disk, and TF card. Simply double-click the multi-function button to easily switch between different playback modes. At home, you can play music directly via the U-Disk or TF card, and when traveling, you can use Bluetooth to connect to smart devices wirelessly and enjoy a high-quality music experience anytime. Bluetooth 5.4 Technology - Featuring the latest Bluetooth V5.4 chipset, this Bluetooth Aux adapter offers greater range and a stable connection with data transfer up to 10 meters. Plus, the device has an automatic reconnection function that allows it to seamlessly reconnect to previously paired devices. Rechargeable - With a Type-C fast charging port, this 3.5mm Bluetooth Aux adapter fully charges in just 2 hours and offers up to 6 hours of continuous use. It supports charging while in use. Pair this Bluetooth Aux adapter with your smartphone, laptop, or Bluetooth stereo and Bluetooth headphones to enjoy your favorite music. Hands-Free Calling - This 3.5mm Bluetooth receiver not only supports high-quality hands-free calls but also supports navigation and voice broadcasting. When driving, you can quickly answer or hang up a call by double-tapping the button, and navigation information is clearly provided through the adapter, allowing drivers to focus on the road.