SPOT X provides 2-way satellite messaging so you can stay connected to family, friends and colleagues whenever you’re outside of cellular range, including direct communication with Search & Rescue services in case of a life–threatening emergency. SPOT X even provides you with your own personal mobile U.S. number so others can message you directly from their cell phone or other SMS devices at any time.

Why SPOT X
Message

Exchange messages with any cell phone number or email address from virtually anywhere in the world.
Tracking

Select from 2½, 5, 10, 30 or 60 minute tracking intervals, and let family, friends and other adventurers follow your progress with SPOT’s easy–to–use Google Maps™ interface.
Compass

Built–in compass and programmable waypoints to help you navigate.
S.O.S.

Send an S.O.S. to the 24/7 Search & Rescue center, message back and forth about the nature of your emergency, and receive confirmation when help is on the way.
Post to Social

Link your social accounts to keep your friends and family in the know wherever you go.
Check In

Quickly and easily let everyone know you’re OK.

Original source:
https://wingsandwheels.com/pilot-supplies/emergency-equipment/spot-x.html