How far can I get two ESP8266 to talk to each other?

Описание: This video is made using a tutorial I found by RandomNerdTutorials
in which I used to test the range of ESP-NOW on a NodeMCU V3 ESP8266
with no router

Random Nerd tutorials link
https://randomnerdtutorials.com/esp-n...

ESP Sender Code link
https://drive.google.com/file/d/1DUBs...

ESP Receiver Code Link
https://drive.google.com/file/d/17VjY...