Two Optional of Mi Bluetooth Audio Dongle:

1st,
USB Bluetooth 5.2 AUX Receiver (RX)
- Mobile/iPad/Laptop bluetooth connects audio to Car Stereo / Amplifier / Home Hi-Fi Speaker... devices by USB/AUX ports which devices without BT function. 
- at RX mode, Mi Dongle's USB for power & audio output if the device supports USB audio. Or USB for power only, AUX cable for audio output to device(s).

Mi USB Bluetooth AUX Audio Receiver Transmitter Phone to Car AMP TV PC to Earbud - Picture 2 of 8


2nd,
Bluetooth 5.2 Receiver (RX) & Transmitter (TX)
- Includes all above 1st Receiver (RX) feature, plus+
- Transmitter (TX) function as output audio from TV, PC, Hi-Fi Amplifier's AUX-OUT port, Dongle's bluetooth links to BT Headphone, Earbuds, BT Speaker, Sound Bar...
- at TX mode, USB of Mi Dongle for power only, audio transmits by AUX cable from TV, PC, Hi-Fi etc. devices

Mi USB Bluetooth AUX Audio Receiver Transmitter Phone to Car AMP TV PC to Earbud - Picture 3 of 8

Package includes:
1x Mi Bluetooth USB AUX (RX) / (RX & TX) Dongle
1x 3.5mm Jack AUX Cable