Need Audio transmitter and receiver (not bluetooth)

[kindai]

I need an audio transmitter and receiver, I tried a bluetooth kit but the signal keeps dropping / is too unreliable.

Does anyone else have any clever solutions?

 

[kindai]

Basically need something portable (as in carry on person), convenient (eg small), self powered, way of sending audio from 1 person to another from a 3.5mm audio jack.

 

[kindai]

https://www.amazon.co.uk/7dayshop-Bluetooth-Wireless-Audio-Transmitter/dp/B0085TQGZG

This is what we currently use.

Alongside

https://www.amazon.co.uk/dp/B004TKC...m=A3P5ROKL5A1OLE&pf_rd_r=CMKA1KJHJCMV9ZQMCV37

 

[kindai]

Walkie talkies?

Mobile phones?

Matches wood and a blanket and for smoke signals?

Too big / inconvenient / dont want to burn the place down.

 

[kindai]

From what and to what? What are the inputs/outputs on the devices?

A data logging device which outputs via audio (3.5mm jack) the expected output, which needs to be picked up by a guy looking at the actual outputs 10-20 meters away who needs to hear it via earpeice or headphones etc. So we currently pair the bluetooth tx/rx units, and i plug the tx into the 3.5mm jack and he plugs his earphones into the rx.

The problem is, the signal isnt great, so it keeps dropping, so need something more reliable.

 

[kindai]

Ah, I see. Is there a wifi equivalent transmitter/receiver combo that would give better range?

Something like this perhaps:
https://www.amazon.co.uk/Audiomate-3-5mm-Wireless-Transmitter-Built/dp/B00B7ID99S

Never used one, mind and it reckons 30m range.

Something like that would probably be ideal.