Meet the goTele: a smart gadget that lets you stay connected with your group even when no cell service is available. It lets you communicate with others in a private network and even send SOS signals.
You can keep track of all your team members in real-time and lets you compare location for up to 30 members. The device has a range of 3.1 miles. You can use the companion app for geo-fencing. Variety of offline maps are available.