2 In 1 AUX Bluetooth 5.3 Receiver Transmitter USB Audio Adapter 1. Bluetooth solution: 5.3 2. Frequency: 2.4GHz-2.48GHz 3. Bluetooth transmittingreceiving distance: 15 meters 4. Bluetooth receiving function: connect 1 mobile phone 5. Bluetooth transmitter function: connect 1 pair of Bluetooth headsets 6. Battery capacity: 180mah 7. Charging time: 30 minutes 8. Play time: 10 hours 9. Built-in high-definition noise reduction call effect, supports AACSBC audio decoding, new elastic push-type back clip, lightweight to wear, can be carried around, used as a receiver, plug in 3.5mm earphones to upgrade wired earphones to Bluetooth earphones 10. 3.5mm aux universal interface, suitable for various audio equipment 11. It can receive and transmit signals in one unit and can be switched freely, suitable for multiple devices. 12. The sound quality is clear and noise-free. It supports AACSBC high-definition audio decoding, which reduces the sound loss and noise floor of wireless transmission and restores the details of the sound. 13. Weight: 14.4g 14. Size: 6x2.2x1.85cm Accessories: - Host x 1 - Charging cable x 1 - Instruction manual x 1 - 3.5mm audio head x 1