Fangrui Product Details 1. M137 5 In 1 Car Usb Bluetooth 5.2 Receiver Transmitter 2. 5 In 1: (support Calls When Receiving) 3. When Receiving, The Audio Can Be Output To The Speaker Through The Audio Cable 4. When Receiving, You Can Directly Output Audio To The Speaker Via Usb 5. When Transmitting, You Can Input Audio To The Adapter Through The Audio Cable, And Then Transmit The Audio To The Bluetooth Headset 4. Machine Or Speaker 6. When Transmitting, You Can Input Audio To The Adapter Via Usb, And Then Transmit The Audio To The Bluetooth Headset Or Speaker 7. Sound Card Function: Computer Usb To 3.5 Headphone, Convert Audio To Headphone 3.5 Audio Output Through Usb Adapter 8. Material: Abs 9. Interface: 3.5mm, Usb 10. Transmission Rate: 3mbps 11. Effective Working Radius: 10m 12. Bluetooth Standard: 5.2 13. Working Frequency: 2.4mhz 14. Button Switch Mode, Convenient And Quick 15. Plug Into The Car Usbaux Port, Connect To The Bluetooth Of The Mobile Phone, And Listen To Songs And Navigate Hands-free Calls. 16. Solve The Problem Of Damage To The Original Sound Card Of The Computer, And Expand The Aux Audio Interface 17. Driver-free Use, Plug And Play 18. Dimensions: 19x38x11mm 19. Weight: About 18 Grams 20. Packing List: 21. - Bluetooth 5.2 Audio Adapter 22. - 3.5mm Audio Cable (1m39in) 23. - Manual