The Spot Satellite messenger gives you a vital line of communication with friends and family when you want it, and emergency assistance when and where you need it. Send and save your location and allow contacts to track your progress using your password and Google Maps. Also allows for emergency responders to be dispatched to your exact location. It utilizes 100% satellite technology allowing for it to work around the world - even where cell phones don't. Low cost satellite service subscription required. Size: 4.38" x 2.75" x 1.5". Weight: 7.37 oz.