What is a gr-scan used for

I was looking through the Kali Linux tools and found his program. It says that it scans and discovers frequencys. What could a supposed hacker do with that?

A quick google search reveals that it scans frequencies of TV’s and Radio with Realtek RTL2832U chip.
More info at: https://tools.kali.org/wireless-attacks/gr-scan

Thx for the information

Also there are some techniques that you need to record the frequencies to decrypt a message (like AES256 for example), but you also need the right hardware…