Bluetooth 5.3 Audio Adapter Receiver Transmitter MP3 Player Supports Wired Headset TF Card 1. High-definition LED screen digital display Bluetooth adapter, connected to an audio playback device with a speaker, receives Bluetooth signals to play music wirelessly; connected to an audio output device, transmits Bluetooth signals, and plays music through paired wireless headphones Bluetooth speakers (receiving and transmitting signals can only be selected one by one, and cannot be used at the same time) 2. Supports TF card playback, supports connecting wired headphones, can be used as MP3, supports FLAC WAV MP3 WAM APE format songs (without memory card, supports up to 64G) 3. Insert into the car AUX interface, and connect to the mobile phone Bluetooth, the car has Bluetooth in seconds, listen to songs, navigate, and make hands-free calls 4. Bluetooth 5.3 chip, driver-free, plug, and play, saves installation trouble, no jamming and zero delays, strong compatibility, and more stable connection 5. High-fidelity stereo sound quality, clear sound quality, enjoy the world of music 6. Supports charging while using, 300mAh rechargeable polymer battery with intelligent fast charging technology, used anytime, anywhere, long-lasting battery life is more convenient Technical parameters: 1. Bluetooth version: Bluetooth 5.3, transmission distance 10m 2. Support Bluetooth hands-free calling function 3. Support Bluetooth dual-channel 4. Frequency: 2.4GHz 5. 3.5mm stereo input jack 6. Sleep mode, energy saving 7. Power supply: Type-C interface 8. Battery capacity: 300 mAh 9. Working time: RCX mode: about 7.5 hours, TX mode: about 5H 10. Product net weight: 28g 11. Product size: 59.6 x 41 x 15mm Packing list: Adapter x 1 Audio cable x 1 Charging cable x 1 Instruction manual x 1