Bluetooth 5.2 Transmitter (TX) & Receiver (RX)

1st,
- Transmitter (TX) function as input audio from TV, PC, Hi-Fi Amplifier's AUX-OUT port to Mi Dongle. Then Dongle's bluetooth links to BT Headphone, Earbuds, BT Speaker, Sound Bar...
- at this TX mode, USB port for power only, audio transmits through AUX port from TV, PC, Hi-Fi etc. devices

Mi USB Bluetooth AUX 3.5 Jack Transmitter for TV PC HiFi Audio to Earbud Speaker - Picture 2 of 11

2nd,
The Dongle also includes Receiver (RX) function
- Mobile/iPad/Laptop bluetooth connects audio to Car Stereo / Amplifier / Home Hi-Fi Speaker... devices through Mi Dongle's USB/AUX ports. 
- at RX mode, Mi Dongle's USB for power & audio output if plug-in device supports USB audio. Or USB for power only, AUX port for audio output to device(s).

Mi USB Bluetooth AUX Audio Receiver Transmitter Phone to Car AMP TV PC to Earbud - Picture 4 of 8

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