Extended range wireless fish finder working at 300 meters - demo

The polystyrene ball has nothing to do with the range extender setup, it was mounted only to make the boat more visible.
I reached the opposite bank at min. 7: 27 and I started to bring the boat back. For a short time, the sonar feedback is chaotic due to shallow water (unable to read less than 0.7 m depth ). At 8: 23 the boat clearly appears from the dark bay on the way back.
The fish finder is the cheapest "Lucky", model FFW-1108-1, having the shortest wireless operating range.
The range extender ( signal booster) is available on ebay
https://www.ebay.co.uk/usr/e-ver-on_uk
Thanks for looking.

Видео Extended range wireless fish finder working at 300 meters - demo канала everon marius