Iridium Extreme -IRI-9575
Combines location awareness, SOS and market leading toughness.
Military-grade durability
Resistance to: Dust, shock, vibration, blowing rain (and more)
Highest Ingress (IP) rating in the industry: IP65
GPS-enabled
Developer kit for short-burst data tracking
Programmable location service menus
Programmable SOS button
https://www.navteam.com/Products/Communication/Iridium/Portable-Iridium-Extreme.html