True Wireless Stereo (TWS) Bluetooth for Speakers

I received four of these yesterday. And for the price it’s really good. Reception for ~15m in a open office landscape.
The voice prompts is really low quality however.

It’s not tws but it would be easy to make a female connector that only pass thru left or right signal.

3-in-1 Bluetooth 5.4 Receiver Transmitter RX/TX/Broadcast 3.5mm AUX Jack Wireless Audio Adapter for TV PC Headphone Car Speaker
https://a.aliexpress.com/_Ex5dymI

Unfortunately not able to connect to my other units that use auracast. Similar to this one: https://www.moor-audio.com/products/moerduo-bluetooth-5-3-auracast-audio-transceiver

And this is probably why not every brand have adopted this new bluetooth standard.

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After using them for a while, the 3,5mm input when using it in broadcast mode is noticeably worse quality than connecting to the unit by standard Bluetooth and then broadcasting this to all the others. USB mode is also good. It’s the analog in that’s lacking.

So to clarify, there’s always one unit that’s responsible for sending the signal to the rest.
It’s possible and advisable that you connect to it by ordinary Bluetooth.
A stereo setup would need three of those units.
A wireless 2.1 setup need four units.
And so on.