Size
2.2" (smallest, most discreet)
Battery Life
Up to 34-day battery life per charge (once daily); 12 days if moving 1 hr/day (updates every min).
Update Speed
Choose your own speed: Fastest updates every 60 sec (or less often).
Coverage
Nationwide US coverage. Also works internationally.
Size
3.1" (compact, most versatile)
Battery Life
14-day battery life per charge (once daily); 9 days if moving 1 hr/day (updates every 5 sec).
Update Speed
Choose your own speed: Fastest updates every 5 sec (or less often).
Coverage
Nationwide US coverage. Also works internationally.
Size
3.4" (largest, longest battery)
Battery Life
Up to 365-day battery life per charge (once daily); 48 days if moving 1 hr/day (updates every min).
Update Speed
Choose your own speed: Fastest updates every 60 sec (or less often).
Coverage
Nationwide US coverage. Also works internationally.
