Getting stuck outdoors without a reliable cell signal is not ideal. The RADACAT Messenger C1 is an off-grid communication device that helps you stay connected your group. It supports offline text messaging and GPS. The device sends your real-time location to other members in your team. You can create teams for private communication and send voice messages to others from the companion app.
The device has a convenient shake-to-talk function. Its long range mesh networking has a range of around 4 miles. The battery lasts for 36 hours. The RADACAT C1 is compatible with iOS and Android devices.[where to get it]