Sonnet is a simple device that makes your smartphone essentially a long-range 2 way radio. Capable of communicating up to 3 miles or up to 5 miles with line of site with another Sonnet device. There is multiple uses for the device rather your out hiking in a remote area or after a major catastrophe such as a hurricane knocking power and cell phone towers out.
For more details please check out Sonnet Kickstarter.
Right now if you pledge $89 or more you can receive 2 Sonnet devices with an estimated delivery of November 2017.