It is possible for other people to overhear the message.
They rendezvoused together after communicating via radio.
radio
agency or radio codes
There are many different locations in which someone can purchase two-way radios. The best retail store to use is Walmart. The best online store to use is Amazon.
agency or radio codes
agency or radio codes
Agency or radio codes.
agency or radio codes
You can see the person (people) you are communicating with via the internet.
A wireless network card works by communicating with Wi-Fi routers and hotspots via radio signals. These Wi-Fi sources then communicate with the internet itself with the same type of signals.
It is possible for other people to overhear the message.
Via Talk is often used for communicating over the internet via the VoIP protocol. You can get more information about VoIP online at the Wikipedia website.