https://en.wikipedia.org/wiki/Dead_drop#Modern_techniques https://en.wikipedia.org/wiki/Dead_drop#Modern_techniques depending on how good of a line-of-sight yo

https://en.wikipedia.org/wiki/Dead_drop#Modern_techniques https://en.wikipedia.org/wiki/Dead_drop#Modern_techniques depending on how good of a line-of-sight you have to the transmitter, you can receive over 50+m using a well-tuned antenna if the transmitter is hidden, range largely depends on what it's hidden inside, but even a phone at the bottom of a backpack can receive from a similarly hidden flipper zero broadcasting from another backpack at about 5-10m