GPS tracker. From manufacturer: ENHANCED TRACKING SERVICES CUSTOM TRACKING RATE SPOT Gen3’s customized tracking allows you to change the rate tracks are sent to 2 ½, 5, 10, 30, or 60 minutes. Extreme Tracking upgrade is required for 2 ½ minute tracking. MOTION-ACTIVATED TRACKING A vibration sensor tells SPOT to send your GPS location when you are moving and to stop when you do.This conserves battery power and avoids sending duplicate tracks. CONTINUOUS TRACKING SPOT Gen3 will send track messages until you turn off your SPOT. No need to reset after 24 hours. FEATURES FEATURES HELP/SPOT ASSIST Request help from your friends and family at your GPS location. Or ask for help from professional assistance organizations. TRACK Automatically send and save your location and allow contacts to track your progress using Google Maps:tm:. CHECK IN Let contacts know where you are and that you’re okay with a preprogrammed message. CUSTOM MESSAGE Let contacts know where you are by sending a pre-programmed message with your GPS location. S.O.S. In an emergency, send an S.O.S. with your GPS location to GEOS, who facilitates search and rescue.