Pair your smartphone to your goTenna device wirelessly, using Bluetooth Low-Energy (BTLE). Your goTenna needs to be within 20ish feet of your phone, so that the two can communicate with each other. Use our free app to type out a text message or share a location. Your smartphone will send the message to your goTenna, which will then shoot it out, via long-range radio waves (151-154 MHz), to the intended goTenna(s). At the other end, the exact same thing happens, in reverse: the recipient goTenna sends your message over BTLE to the smartphone app it’s paired with. All of this happens in a matter of milliseconds.
Your goTenna is able to transmit to any goTenna user within range. What kind of range can you expect? That's greatly dependent on your geography. Check out our How it Works page to get a sense for what kind of range you can expect in specific scenarios.