GoTenna pairs with a smartphone, then it uses VHF signals—like traditional two-way radios—to allow users to text and share locations even when they have no service, be that in an emergency situation or in a crowded stadium environment. Pair goTenna to your smartphone via Bluetooth and use the goTenna app to communicate with other goTennas up to several miles or kilometers away. In less than a minute, you can create a smart, people-powered network, anywhere. No towers, routers or satellites required.