1Mii ML300 Bluetooth Transmitter Receiver

The Latest Bluetooth 5.3: The latest bluetooth 5.3 technology enables your aux bluetooth adapter backward compatible with bluetooth 5.2/5.1/5.0/4.2/4.0/3.0/2.0 and it can deliver more stable wireless to your devices.
Aptx Low Latency: With advanced aptx low latency technologies, it can deliver up 80% lower latency. Whether you are playing video games or watching movies, you'll experience high quality sound without audio and video to be out of sync issue.
2-in-1 Transmitter and Receiver: In tx mode, it is very easy to turn a non-bluetooth tv, pc, gym/flight equipment into bluetooth transmitter. In rx mode, it can make music stream to those speakers/car/home stereo systems which without bluetooth.
Wide Compatibility: 1Mii bluetooth audio adapter supports the devices with 3.5mm aux/2RCA audio jack.
Long Battery Life: 1Mii bluetooth receiver for home stereo deliver 12 hours in transmitter mode and up to 15 hours in receiver mode, all on one charge.

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[BrentRauscher]

not simple to setup. I never got this to work...