This is GoTenna
Heading into the wilderness where there's no cell service? You need GoTenna. It creates a private wireless network you can use to send text messages and share your location with friends.
Antennas and radios
GoTenna uses special radios to send messages between the two devices. It connects to your phone via Bluetooth.
Two-pack
GoTenna is sold in a two-pack, because you need one device per phone to communicate. GoTenna cannot connect to a regular wireless network, so you cannot use it to make calls or go online.
Colorful strap
There's a strap on the back of each device that secures it to any bag or backpack. The strap comes in four colors: purple, orange, blue and green.
Clip it
GoTenna recommends you strap the device to a bag, since it works better hands-free.
Text away
With the GoTenna app, you can send messages and send your location to anyone else with a GoTenna nearby.
Portable
GoTenna is no larger than a granola bar and is dead-simple to use. Just slide out the antenna to turn it on.