Look like it is a TaoTronics TT-BA09 $89.99 from Kogan
TOSLINK model out of stock, non TOSLINK still in stock
TRANSMITTER + RECEIVER: A portable adapter to use as a transmitter or receiver; Latest generation Bluetooth 5.0 to connect two pairs of earphones or two speakers at a time Tip: If you are using products such as earphones and speakers, use the transmitter mode If you are using products such as computers, tablets, phones, etc., please use the receiver mode . Please don't use the wrong mode,
otherwise it will fail to connect.
3.5mm + OPTICAL: Even more possibilities of use with a connection via a 3.5mm cable (AUX and RCA) and a digital lens (TOSLINK) both in input and output.
SYNCHRONIZED: The low latency aptX technology allows you to watch TV / movie / video via Bluetooth without the slightest audio delay.
CONTINUOUS PLAYBACK AND AUTOMATIC RE-PAIRING: The internal 350mah battery allows you to play audio for 15 hours continuously and can be recharged during playback; automatically reassociates with previously associated devices.
WIRELESS TRANSMISSION: Turn your old stereo and wired headphones into Bluetooth transmission devices; pair them with your smartphone or tablet and listen to your music up to 13m (39 feet) away.
Does this mean you can listen to multiple bt headphones from the same source?